lubuntu installer crashes when installing on macbook air

[Sweth]

consistently crashes when partitioning

first, ubi-partman crashes w/ exit code 141
if I click try again, ubi-partman crashes w/ exit code 10
All subsequent attempts result in the same exit code 10

lubuntu 16.04.1 LTS installer

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.2
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Sun Aug 7 07:39:06 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/preseed/ubuntu.seed boot=casper iso-scan/filename=/efi/boot/boot.iso quiet splash --
LiveMediaBuild: Lubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

You seem to be trying to upgrade an existing installation that is in an ext2 partition ( which you shouldn't be using ) and it is corrupt. You should either fsck this partition to repair it before attempting to reinstall, or better yet, have the installer format it using ext4 instead of the deprecated ext2 filesystem.