OSX: "Minecraft quit unexpectedly" on launcher startup
Moderator Note
This seems to be a common issue on Mac OS X 10.8.5 - Temporarily, you need to use the legacy launcher and have Java installed: http://launcher.mojang.com/download/Minecraft_legacy.dmg
Please be aware that Mac OS X 10.8 is no longer supported, the minimum requirement has risen to OS X 10.9: https://help.mojang.com/customer/portal/articles/325948
crashes consistently , despite removal and reinstall , reboot , upgrade of JVM etc.
crash dump attached.