arduinoIDE won't install

hi I'm using an iMac from 2008 running MacOS 10.11.6 .. when I download the IDE it installs then promptly quits, with no message. Is V.1.8.8 actually not compatible with this MacOS version? thanks

Nobody else has reported compatibility issues with 1.8.8 and MacOS, and I’ve seen a number of other people using MacOS with 1.8.8 - so this is some other issue.

I don’t know how to debug that issue on mac, though.

Yes, Arduino IDE 1.8.8 is incompatible anything older than macOS 10.12: https://github.com/arduino/Arduino/issues/8274 You can use Arduino IDE 1.8.7.

This bug has already been fixed but there has not been a release of the Arduino IDE since that time: https://github.com/arduino/Arduino/pull/8281

If you really need something newer than Arduino IDE 1.8.7, you can use the hourly build of the Arduino IDE: https://www.arduino.cc/en/Main/Software#hourly but you should be aware that it is intended primarily for beta testing and may have bugs.

thank you Pert!

You're welcome. I'm glad if I was able to be of assistance. Enjoy! Per