I just installed the mac 10.11 (El Capitan) OS on my older MacBook Pro last night and was disappointed to find the arduino IDE shuts down and gives the attached errors when I attempt to launch the application. The Arduino starter kit owners manual states (p.17) that the IDE download is compatible with “OS 10.5 or later.”
I have searched several posts by others in this forum and outside but nothing I have tried so far has helped. A bit frustrating since my current hardware will only support up to OS 10.11 and I took arduino at it’s word with the OS versions supported.
Any feedback is appreciated.