02-16-2019, 05:16 PM
Hello! I'm new to this forum and realize this is an old thread, but just wanted to check in as one more mac user 
I switched back to GIMP a month ago after having used Photoshop-only for 18 years (since OSX was released).
I also ran into the "unidentified developer" issue as well. It sounds like you resolved it with McGimp already, however, in case any other mac users happen to stumble upon this thread, the following solution will work as long as you have admin-level credentials for the machine on which it's installed (only do this with trusted apps you're certain aren't malicious)
You can make GIMP an "exception" by following these instructions as per Apple's support site, which worked for me as described:
"In the Finder, Control-click the app, choose Open from the menu, and in the dialog that appears, click Open. Enter your admin name and password when prompted. The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app."
Tip: make sure to go through the steps as described - do it via the Finder & not from Launchpad because it won't work. Finally, since Apple support specified to do this via the Finder, I assumed the OS needed a fully qualified path to make the "exception," so I went step by step and selected "Open" from the menu as described instead of using any shortcut. Lastly, I made an alias on my desktop because launching it from Launchpad would occasionally cause a "hiccup" where it would hang too long & I'd have to relaunch. Launching it from the desktop has thus far been trouble-free and stable.
I'll check out McGimp, though, thanks for the suggestion!
I switched back to GIMP a month ago after having used Photoshop-only for 18 years (since OSX was released).
I also ran into the "unidentified developer" issue as well. It sounds like you resolved it with McGimp already, however, in case any other mac users happen to stumble upon this thread, the following solution will work as long as you have admin-level credentials for the machine on which it's installed (only do this with trusted apps you're certain aren't malicious)
You can make GIMP an "exception" by following these instructions as per Apple's support site, which worked for me as described:
"In the Finder, Control-click the app, choose Open from the menu, and in the dialog that appears, click Open. Enter your admin name and password when prompted. The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app."
Tip: make sure to go through the steps as described - do it via the Finder & not from Launchpad because it won't work. Finally, since Apple support specified to do this via the Finder, I assumed the OS needed a fully qualified path to make the "exception," so I went step by step and selected "Open" from the menu as described instead of using any shortcut. Lastly, I made an alias on my desktop because launching it from Launchpad would occasionally cause a "hiccup" where it would hang too long & I'd have to relaunch. Launching it from the desktop has thus far been trouble-free and stable.
I'll check out McGimp, though, thanks for the suggestion!