OK, you need another finger now. I also use a case sensitive file system for Linux compatibility. I am a web site developer and all the company web servers run Linux, which is case sensitive so to be able to reliably transfer files back and forth I use a case senstive Mac file system too.
Sketchup 17.2.2554 always crashes with a Bugsplat on startup.
I note Barrys workaround of invoking with
open /Applications/SketchUp\ 2017/SketchUp.app --args DisableRubyAPI YES
gets past the crash. Thanks for that Barry.
I would have thought the smart thing for OSX developers to do is run case sensitive, then your program will need to get the file name case correct and work on any type of installation.