First of all: under Windows I could not reproduce the crash using the same midi controllers. I tried to compile Mixxx with the instructions by jus...but failed again: Maximilians-MacBook-Air:MacOS DJMaxergy$ brew tap cartr/qt4 Updating Homebrew... ==> Auto-updated Homebrew! Updated 1 tap (homebrew/core). ==> New Formulae amber libdill arm-linux-gnueabihf-binutils libjwt ask-cli libomp auditbeat libsbol augustus libserialport autopep8 libtomcrypt ballerina llvm@5 bamtools lm4tools bareos-client lmod bcal lzfse bcftools mafft bedops mariadb-connector-odbc bioawk maxwell blast mdcat boost-python3 mill bwa mint caffe mmseqs2 calicoctl monero chrome-export mpir clblast neomutt console_bridge nyx container-diff ocrmypdf coreos-ct octomap cp2k odpi darksky-weather opencascade dartsim openimageio dashing orocos-kdl defaultbrowser parallelstl diamond php-cs-fixer docker-squash plank draco posh dynare primer3 elektra python@2 fastme qsoas fcl qtkeychain field3d restview flintrock rtptools fruit samtools fselect scrcpy futhark seqtk ghc@8.2 shelltestrunner git-sizer shogun glances sickle go-bindata siril go-statik skaffold go@1.9 skafos gocryptfs spades goto sratoolkit gox srt gpredict stellar-core grv stress-ng gtksourceview@4 telnetd hlint terraforming hmmer tj howdoi tmux-xpanes hss tnftp icemon tnftpd jdupes tomcat@8 jthread travis kallisto unravel krakend urdfdom kube-ps1 urdfdom_headers kumo vcftools lammps vis latexdiff visp libbi webtorrent-cli libbitcoin-consensus wp-cli libbitcoin-network yq libccd zig ==> Updated Formulae chromaprint ✔ libglade fftw ✔ libglademm git ✔ libgnomecanvas jpeg ✔ libgnomecanvasmm libvorbis ✔ libgosu openssl ✔ libgtop protobuf ✔ libgweather qt ✔ libhdhomerun abcde libhttpseverywhere abcm2ps libical abcmidi libinfinity abnfgen libjson-rpc-cpp abyss liblas ace liblcf ack liblunar acmetool liblwgeom acpica libmagic advancecomp libmatio advancemame libmaxminddb adwaita-icon-theme libmicrohttpd agda libmonome agedu libmpc akamai libmpdclient algernon libmspub allure libmtp alot libnice amazon-ecs-cli libnotify ammonite-repl libosinfo angband libpagemaker angular-cli libphonenumber anjuta libpq ansible libpqxx ansible-cmdb libpst ansible-lint libqalculate ansifilter librasterlite ant libraw antigen librdkafka apache-arrow libre apache-geode librealsense apache-opennlp libressl apache-spark librest apibuilder-cli librsvg apktool librsync apm-server libsass app-engine-java libsecret app-engine-python libsigsegv appscale-tools libsoup aqbanking libspatialite arangodb libstfl argon2 libstrophe argus-clients libswiften argyll-cms libtasn1 armadillo libtensorflow armor libtiff arpack libtorrent-rasterbar artifactory libtrace arx libtrng asciidoctor libu2f-host asciinema libu2f-server asdf libucl astyle libunistring at-spi2-atk libupnp at-spi2-core libusb atdtool libuv atk libvirt atkmm libvisio atlassian-cli libvoikko ats2-postiats libvpx audacious libwebsockets augeas libxc autoconf-archive libxlsxwriter autogen libzdb automake libzip awf libzzip aws-elasticbeanstalk link-grammar aws-sdk-cpp linkerd awscli liquibase azure-cli liquigraph babl little-cms backupninja llnode bam llvm bandcamp-dl llvm@3.9 baobab llvm@4 baresip lnav bartycrouch log4cplus basex logentries bash logrotate bash-git-prompt logstalgia bash-preexec logstash bash-snippets logtalk bazel lorem bdw-gc lua bear lua@5.1 beast lumo bee lwtools bench lxc bento4 lynis bettercap lysp betty lz4 bfg lzip bigloo lzlib binaryen mackup bind macosvpn binutils macvim binwalk magic-wormhole biogeme makensis bit mame bitcoin mapnik bitrise mapserver blackbox mariadb blastem mariadb-connector-c bluepill mariadb@10.0 blueutil mariadb@10.1 bmake mas bokken masscan boost mat boost-bcp maven boost-build mbedtls boost-mpi mdk boost-python mdp boost-python@1.59 media-info boost@1.55 mediaconch boost@1.57 mednafen boost@1.59 memcached boost@1.60 menhir bork mercurial botan meson bowtie2 mesos braid metabase brew-gem metaproxy bro metricbeat brotli mftrace bsponmpi mgba btfs micro bubbros micropython buildapp mikutter buildifier miller buku mimic burp minbif byobu mingw-w64 byteman minimal-racket bzt minio-mc c-ares minisign cabal-install miniupnpc caddy minizinc caf mitmproxy cake mkdocs calabash mksh calc mkvtoolnix camlp5 mlt cargo-completion mlton carthage mockserver cask moco cassandra modules castxml molecule cattle monetdb cayley mongo-c-driver cc65 mongo-cxx-driver ccache mongodb ccm mongodb@3.0 cdk mongodb@3.2 ceres-solver mongodb@3.4 certbot mongoose certigo monitoring-plugins cfengine moreutils cfitsio mozjpeg cfr-decompiler mp3gain cfssl mpc cgal mpd cgrep mpdas chakra mpfi chamber mpfr charm-tools mpg123 cheat mpich check_postgres mplayershell checkstyle mps-youtube chibi-scheme mpv chisel mr chocolate-doom mrboom chromedriver mruby chronograf msitools chuck mu cimg mujs citus multimarkdown cjdns mutt ckan mycli clamav mypy clang-format mysql clearlooks-phenix mysql++ clhep mysql-connector-c++ cliclick mysql-sandbox clinfo mysql@5.5 clipper mysql@5.6 cloc mytop clojure nagios-plugins cloog nailgun closure-compiler nano clutter nanopb-generator clutter-gst nasm clutter-gtk nativefier cmake nats-streaming-server cmark ncdu cmark-gfm ncmpcpp cnats nco cockatrice ncurses cockroach neko cocoapods neo4j coffeescript neovim cogl nesc collectd net-snmp collector-sidecar netcdf compcert netpbm conan newsboat conjure-up nghttp2 consul nginx consul-backinator ngrep convmv nicotine-plus convox nifi coq nikto corebird nim coreutils nmap corsixth nnn couchdb node cppad node-build cppcheck node@4 cppcms node@6 cpprestsdk node@8 cracklib nodebrew creduce nodeenv cromwell nomad crosstool-ng nopoll crowdin noti cryfs notmuch cryptopp nq crystal-icr nrpe crystal-lang nsd csvkit nspr csvtomd nss ctop ntopng cucumber-cpp ntp curl nuget cvs2svn numpy cython nuxeo czmq nvc daemonize ocaml dar ocaml-num datamash ocamlsdl datetime-fortran octave dateutils ode datomic offlineimap davmail ola dbhash onetime dbus oniguruma dbus-glib onioncat dcd ooniprobe dcm2niix open-babel dcmtk open-mpi dcos-cli open-scene-graph ddgr openblas ddrescue opencoarrays debianutils opencolorio dehydrated opencv dep opencv@2 dependency-check opendetex devd openldap dfix openrct2 dfmt openrtsp dhall-json openshift-cli diff-pdf openslide diff-so-fancy openssl@1.1 diffoscope openttd diffuse openvpn digdag ophcrack direnv orc-tools dislocker ortp distcc oscats ditaa osm-gps-map django-completion osm2pgrouting dlib osm2pgsql dmd osquery dmenu osrm-backend dnscrypt-proxy overmind dnscrypt-wrapper owfs dnsmasq p11-kit docfx p7zip docker packer docker-completion packetbeat docker-compose packmol docker-compose-completion paket docker-gen pandoc docker-machine pandoc-citeproc docker-machine-completion pandoc-crossref docker-machine-nfs pango doctl pangomm dovecot paps doxygen par2 doxymacs parallel dpkg pari dropbear pass druid passenger dscanner passpie dspdfviewer pastebinit dssim pazpar2 dtc pc6001vx dub pcb duc pcb2gcode duck pcl dungeon pcre duo_unix pcsc-lite duplicity pdal duply pdf2htmlex dwarfutils pdf2svg dwdiff pdfgrep e2fsprogs pdfpc easy-tag pdfsandwich ebook-tools pdftoedn ecl pdftoipe editorconfig pdns efl pdnsrec eiffelstudio peco ejabberd pegtl elasticsearch percona-server elasticsearch@5.6 percona-server@5.6 elixir percona-toolkit elvish percona-xtrabackup emacs-clang-complete-async pex embulk pg_top emscripten pgbouncer encfs pgcli enchant pgformatter enigma pgloader entr pgplot envconsul pgpool-ii ephemeralpg pgroonga eralchemy pgrouting erlang phoronix-test-suite erlang@18 pianod erlang@19 picard-tools etcd pick etsh picocom evince pidgin exempi pigz exiftool pilosa exim pinentry exomizer pioneer expect pioneers exploitdb pipenv f3 pius faad2 pjproject faas-cli planck fabio plantuml fades platformio fail2ban plplot fastbit plzip fb-client pmd fbi-servefiles pngquant fceux poco fd pod2man fdclone points2grid fdk-aac ponyc fdroidserver ponysay feedgnuplot poppler feh postgis fetch-crl postgres-xc ffe postgresql ffmbc postgresql@9.4 ffmpeg postgresql@9.5 ffmpeg@2.8 postgresql@9.6 fibjs postgrest file-roller povray filebeat pqiv fio pre-commit firebase-cli prefixsuffix fish presto fizmo primesieve flatcc prips flow proguard fltk proj fluent-bit prometheus fluid-synth proof-general flyway protobuf@2.5 fmt pspg fn psqlodbc fobis pumba folly pure-ftpd fontforge pushpin fonttools pwntools forego py2cairo format-udf py3cairo fossil pybind11 fox pyenv freeciv pygobject freedink pygobject3 freeipmi pygtk freeling pygtkglext freeradius-server pygtksourceview freeswitch pyinvoke freetds pypy freetype pypy3 freexl pyqt fribidi python frobtads python-markdown frugal pytouhou fuego qbs fuse-emulator qca fuse-zip qd fwup qemu g3log qmmp gabedit qpdf gammaray qpid-proton gammu qrupdate ganglia qscintilla2 gauge quantlib gawk questdb gbdfed quex gcab quicktype gcc r gcc@4.9 rabbitmq gcc@5 radamsa gcc@6 radare2 gcovr rakudo-star gdal rancher-cli gdb ranger gdbm ratfor gdcm rawtoaces gdk-pixbuf rbenv-aliases gdl rbenv-binstubs gdmap rbenv-bundle-exec gdnsd rbenv-bundler gearman rbenv-bundler-ruby-version geckodriver rbenv-chefdk gecode rbenv-communal-gems gedit rbenv-ctags geeqie rbenv-default-gems gegl rbenv-gemset genometools rbenv-use geocode-glib rbenv-vars geoip rbenv-whatis geoserver rclone gerbv re2 get-flash-videos rebar@3 get_iplayer recon-ng getdns recutils geth redex getmail redis gexiv2 redland gforth reminiscence ghc restic ghex rex ghi rgbds giflossy rhash gifsicle riemann gifski ripgrep gimme rkhunter ginac rocksdb gist rom-tools git-annex root git-archive-all roswell git-cinnabar rpm git-cola rrdtool git-extras rst-lint git-fresh rsync git-ftp rtags git-imerge rtv git-integration ruby git-lfs ruby-build git-recent ruby@1.8 git-remote-hg ruby@2.0 git-secret ruby@2.2 git-standup ruby@2.3 git-town rust gitbucket rustup-init gitg s-nail github-keygen s-search gitlab-runner s3-backer gitless s6 gjs sagittarius-scheme gkrellm saldl glade saltstack glbinding sane-backends glib sassc glib-networking saxon glib-openssl sbcl global sbt glpk sbt@0.13 gmime sbtenv gmp scala gmsh scala@2.10 gmt scalapack gmt@4 scamper gnatsd sccache gnome-autoar sceptre gnome-builder schismtracker gnome-doc-utils scipy gnome-recipes scummvm gnome-themes-standard scummvm-tools gnu-cobol sdl2 gnu-smalltalk sdl2_image gnu-tar sdl_mixer gnu-time sdlpop gnumeric selecta gnupg selenium-server-standalone gnupg@2.0 serialosc gnuradio serveit gnutls sfcgal go sfk go-jira shadowsocks-libev go@1.8 shairport-sync gobby shfmt gobject-introspection shmcat gobuster shocco godep shunit2 goenv shyaml goffice sile gollum silk gom simg2img gomplate simgrid goocanvas simple-tiles goofys singular googler sip gopass sjk gosu sleuthkit gource slimerjs gpa smlnj gpatch snakemake gpg-agent snapcraft gqview snappy gradle snappystream gradle-completion snapraid grafana sngrep grails snort grakn socat graphene solr graphicsmagick sonar-scanner grc sonarqube grib-api sops grip sound-touch gromacs source-highlight gron source-to-image groonga sourcekitten groovy sourcery groovyserv sparkey grpc spatialite-gui grsync spatialite-tools gsettings-desktop-schemas spdlog gsmartcontrol speech-tools gsoap speedtest-cli gspell sphinx gssdp sphinx-doc gst-editing-services spigot gst-libav spin gst-plugins-bad spotbugs gst-plugins-base sql-translator gst-plugins-good sqlcipher gst-plugins-ugly sqldiff gst-python sqlite gst-rtsp-server sqlite-analyzer gst-validate sqlmap gstreamer squashfs gstreamermm ssh-audit gtk+ sshguard gtk+3 sslh gtk-chtheme sslscan gtk-doc sslsplit gtk-engines sslyze gtk-gnutella sstp-client gtk-mac-integration statik gtk-murrine-engine stdman gtk-vnc stella gtkdatabox stk gtkextra stlink gtkmm stockfish gtkmm3 stone-soup gtksourceview storm gtksourceview3 streamlink gtksourceviewmm strongswan gtksourceviewmm3 stubby gtkspell3 submarine gucharmap subversion guile subversion@1.8 guile@2.0 suil gupnp suite-sparse gupnp-av sundials gupnp-tools superlu gutenberg supervisor gwenhywfar surfraw gwt suricata gwyddion svgcleaner gxml svgo gzip svtplay-dl h2 swagger-codegen hackrf swi-prolog hadolint swift-protobuf hadoop swiftformat hana swiftgen haproxy swiftlint harfbuzz sword hashcat sylpheed hashpump sync_gateway haskell-stack syncthing haste-client synfig hatari sysbench haxe sysdig hayai systemc hdf5 szip hdf5@1.8 taisei headphones taktuk heartbeat talloc help2man tarantool henplus tbb heroku tcc hexgui tcl-tk hfstospell tclap hg-fast-export tectonic hg-flow telegraf hh teleport highlight tepl hledger termbox homebank terminator hopenpgp-tools termius hostess terraform html-xml-utils terraform_landscape htmldoc terragrunt htop testssl htslib texmath http-parser thefuck http-server thrift httpd thrift@0.9 httpie tig hubflow tile38 huexpress timewarrior hugo tin hwloc tintin hydra tippecanoe hyperscan titlecase hypre tldr i2p tnef i3 todoman i3status tokei ib tomcat ibex tomcat-native icarus-verilog tomee-webprofile ice tor icoutils tracebox icu4c traefik ideviceinstaller trafficserver idnits translate-shell idris translate-toolkit igv transmission imagemagick treefrog imagemagick@6 ttf2eot imagesnap ttfautohint immortal tth infer ttyd influxdb ttyrec innotop twarc inspectrum twine-pypi inspircd twoping io twtxt iperf3 txr ipfs typescript ipython u-boot-tools ipython@5 ucon64 ircd-hybrid udpxy iron-functions udunits irssi uftp isc-dhcp uhd isl unbound iso-codes unibilium jadx unison jags unixodbc javarepl unoconv jbake unrar jbig2enc unyaffs jena urh jenkins uriparser jenkins-job-builder urweb jenkins-lts userspace-rcu jetty uwsgi jetty-runner v8 jfrog-cli-go vagrant-completion jhiccup vala jhipster vapoursynth jing-trang varnish jmeter vault jmxtrans vcdimager jnettop vdirsyncer joe veclibfort joplin verilator jq vert.x jruby viewvc json-fortran vifm json-glib vim jsoncpp vim@7.4 jsonnet vips jsvc vnstat juju vnu juju-wait vte jump vte3 jupyter vtk just vultr jvgrep w-calc jvm-mon w3m kafka watson kaitai-struct-compiler weboob kapacitor webpack karn websocketd kedge weechat keepassc wesnoth kerl wget khal whatmp3 khard whohas kibana whois kibana@5.6 widelands kitchen-sync wiggle kite wine klavaro winetricks knot wiredtiger knot-resolver wireguard-tools kobalt wireshark kompose woboq_codebrowser konoha wolfssl kontena wpcli-completion kops wpscan kotlin writerperfect kpcli wrk kubeless wtf kubernetes-cli wwwoffle kubernetes-helm wxmac lablgtk wxmaxima lame wxpython landscaper x264 languagetool x265 lapack x3270 lasi xapian lastpass-cli xboard laszip xcenv latex2html xdot latexila xerces-c lbdb xmake lcm xml-tooling-c ldc xmrig ldns xonsh lean-cli xpdf leaps xrootd ledger xsane ledit xtensor legit xvid lensfun xxhash leptonica yaf less yaml-cpp lgogdownloader yara libatomic_ops yarn libav yaz libbitcoin yaze-ag libbitcoin-blockchain yelp-tools libbitcoin-database yeti libbitcoin-explorer ykman libbitcoin-node ykneomgr libbitcoin-server ykpers libbladerf yle-dl libcddb yosys libcdio you-get libcdr youtube-dl libcds z3 libchamplain zabbix libconfig zanata-client libcouchbase zebra libdvdcss zenity libdvdnav zero-install libdvdread zeromq libebur128 zile libepoxy zim libfabric zimg libfixposix zint libfreehand znc libgaiagraphics zookeeper libgdata zorba libgee zplug libgeotiff zpython libgetdata zsh libgig zsh-lovers libgit2 zstd libgit2-glib ==> Renamed Formulae camlistore -> perkeep php72 -> php tachyon -> alluxio php71 -> php@7.1 ssreflect -> math-comp ==> Deleted Formulae antlr@3 libpqxx@3 apache-spark@1.5 libxml2@2.7 apache-spark@1.6 litmus autoconf@2.64 llvm@3.8 automake@1.12 logstash@2.4 azure-cli@1 logstash@5.6 bazel@0.2 mal4s clang-format@3.8 mg3a cloog@0.15 mimetic cloudbees-sdk mongodb@2.6 clozure-cl moodbar docker@1.11 mpfr@2 docker@1.71 mvptree eigen@3.2 nazghul gcc@4.6 open-mpi@1.6 gcc@4.7 otto gcc@4.8 pcap_dnsproxy glfw@2 percona-server@5.5 gmp@4 perl@5.14 go@1.5 picolisp go@1.6 pond go@1.7 ponscripter-sekai grails@2.5 ppl@0.11 gsl@1 python3 gst-plugins-bad@0.10 qt@5.7 gst-plugins-base@0.10 redis@2.6 gst-plugins-good@0.10 root@5 gst-plugins-ugly@0.10 ruby@1.9 gstreamer@0.10 ruby@2.1 influxdb@0.8 selenium-server-standalone@2.45 isl@0.11 srtp@1.6 isl@0.12 stklos isl@0.14 swig@2 jetty@8 talk-filters jpeg@6 tomcat@8.0 juju@1.25 ufoai kubernetes-cli@1.3 unison@2.40 laszip@2 voltdb ledger@2.6 zeromq@3.2 libmpc@0.8 zeromq@4.0 libpng@1.2 zeromq@4.1 ==> Tapping cartr/qt4 Cloning into '/usr/local/Homebrew/Library/Taps/cartr/homebrew-qt4'... remote: Counting objects: 29, done. remote: Compressing objects: 100% (29/29), done. remote: Total 29 (delta 0), reused 5 (delta 0), pack-reused 0 Unpacking objects: 100% (29/29), done. Tapped 21 formulae (77 files, 103.4KB) Maximilians-MacBook-Air:MacOS DJMaxergy$ brew tap-pin cartr/qt4 ==> Pinned cartr/qt4 Maximilians-MacBook-Air:MacOS DJMaxergy$ brew install qt@4 Updating Homebrew... ==> Installing qt@4 from cartr/qt4 ==> Installing dependencies for cartr/qt4/qt@4: openssl ==> Installing cartr/qt4/qt@4 dependency: openssl ==> Downloading https://homebrew.bintray.com/bottles/openssl-1.0.2o_1.high_sierr ==> Downloading from https://akamai.bintray.com/67/67a795f419adcc7f2cc9c204538f2 ######################################################################## 100.0% ==> Pouring openssl-1.0.2o_1.high_sierra.bottle.tar.gz ==> Caveats A CA file has been bootstrapped using certificates from the SystemRoots keychain. To add additional certificates (e.g. the certificates added in the System keychain), place .pem files in /usr/local/etc/openssl/certs and run /usr/local/opt/openssl/bin/c_rehash This formula is keg-only, which means it was not symlinked into /usr/local, because Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries. If you need to have this software first in your PATH run: echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile For compilers to find this software you may need to set: LDFLAGS: -L/usr/local/opt/openssl/lib CPPFLAGS: -I/usr/local/opt/openssl/include ==> Summary 🍺 /usr/local/Cellar/openssl/1.0.2o_1: 1,791 files, 12.3MB ==> Installing cartr/qt4/qt@4 ==> Downloading https://dl.bintray.com/cartr/bottle-qt4/qt@4-4.8.7_3.high_sierra ==> Downloading from https://akamai.bintray.com/10/100dcdaef47f3bb016acbe1826b58 ######################################################################## 100.0% ==> Pouring qt@4-4.8.7_3.high_sierra.bottle.tar.gz Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink Frameworks/Qt3Support.framework /usr/local/Frameworks is not writable. You can try again using: brew link qt@4 ==> Caveats We agreed to the Qt opensource license for you. If this is unacceptable you should uninstall. Phonon is not supported on macOS Sierra or with Xcode 8. WebKit is no longer included for security reasons. If you absolutely need it, it can be installed with `brew install qt-webkit@2.3`. ==> Summary 🍺 /usr/local/Cellar/qt@4/4.8.7_3: 2,962 files, 86.4MB Maximilians-MacBook-Air:MacOS DJMaxergy$ brew link qt@4 Linking /usr/local/Cellar/qt@4/4.8.7_3... Error: Could not symlink Frameworks/Qt3Support.framework /usr/local/Frameworks is not writable. Maximilians-MacBook-Air:/ DJMaxergy$ cd Users/DJMaxergy/mixxx/ Maximilians-MacBook-Air:mixxx DJMaxergy$ scons --clean scons: Reading SConscript files ... INFO:root:Target Platform: osx INFO:root:Target Machine: x86_64 INFO:root:Build: debug INFO:root:Toolchain: gnu INFO:root:Crosscompile: NO INFO:root:Qt path: /Library/Frameworks Exception: Qt4 command 'moc' not found. Tried: /Library/Frameworks/bin/moc-qt4, /Library/Frameworks/bin/moc-qt4.exe, /Library/Frameworks/bin/moc4, /Library/Frameworks/bin/moc4.exe, /Library/Frameworks/bin/moc, /Library/Frameworks/bin/moc.exe: File "/Users/DJMaxergy/mixxx/SConstruct", line 72: toolchain, available_features) File "/Users/DJMaxergy/mixxx/build/mixxx.py", line 217: **extra_arguments) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 982: apply_tools(self, tools, toolpath) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 107: env.Tool(tool) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 1789: tool(self) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Tool/__init__.py", line 298: self.generate(env, *args, **kw) File "/Users/DJMaxergy/mixxx/build/qt4.py", line 683: QT4_MOC = locateQt4Command(env,'moc', env['QT4DIR']), File "/Users/DJMaxergy/mixxx/build/qt4.py", line 670: raise Exception("Qt4 command '" + command + "' not found. Tried: " + ', '.join(triedPaths)) Maximilians-MacBook-Air:mixxx DJMaxergy$ ls CHANGELOG SConstruct plugins CODE_OF_CONDUCT.md appveyor.yml res COPYING build script LICENSE cache scripts Mixxx-Manual.pdf lib src README mixxx vamp-plugins README.md osx64_build Maximilians-MacBook-Air:mixxx DJMaxergy$ scons stdlib=libc++ scons: Reading SConscript files ... INFO:root:Target Platform: osx INFO:root:Target Machine: x86_64 INFO:root:Build: debug INFO:root:Toolchain: gnu INFO:root:Crosscompile: NO INFO:root:Qt path: /Library/Frameworks Exception: Qt4 command 'moc' not found. Tried: /Library/Frameworks/bin/moc-qt4, /Library/Frameworks/bin/moc-qt4.exe, /Library/Frameworks/bin/moc4, /Library/Frameworks/bin/moc4.exe, /Library/Frameworks/bin/moc, /Library/Frameworks/bin/moc.exe: File "/Users/DJMaxergy/mixxx/SConstruct", line 72: toolchain, available_features) File "/Users/DJMaxergy/mixxx/build/mixxx.py", line 217: **extra_arguments) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 982: apply_tools(self, tools, toolpath) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 107: env.Tool(tool) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Environment.py", line 1789: tool(self) File "/usr/local/Cellar/scons/3.0.1/libexec/scons-local/SCons/Tool/__init__.py", line 298: self.generate(env, *args, **kw) File "/Users/DJMaxergy/mixxx/build/qt4.py", line 683: QT4_MOC = locateQt4Command(env,'moc', env['QT4DIR']), File "/Users/DJMaxergy/mixxx/build/qt4.py", line 670: raise Exception("Qt4 command '" + command + "' not found. Tried: " + ', '.join(triedPaths)) Maximilians-MacBook-Air:mixxx DJMaxergy$ Why is QT4 command 'moc' not found?