I am currently preparing the next nightly for tomorrow. If you want you can try with the new IDE app (should work, since I am myself working with OSX 10.10). http://nightly.sikuli.de/newindex.html feedback welcome. Raimund Am 19.03.2015 um 15:03 schrieb Benjamin Lok: yes, i do run the mail app from apple. please note that the script slowing down thing happens even when i restart my mac, have nothing open, then just run sikuli and start the script. it first runs pgadmin, then excel, then mail. it never makes it out of excel before it slows to a crawl. do you think some sort of screencap/share would help? Benjamin Lok, Ph.D. Co-Founder and Product Manager Shadow Health, Inc.