Hi,
After installing the latest, amazing MG3 .074 on my Mac, I have had some trouble to overwrite older patches I have made in MG3. The solution was to use this command in terminal:
chmod -R 777 /path/to/folder.
In my case the folder was found here: /Users/MyName/Library/Application\ Support/JamOrigin/Patches/MIDI\ Guitar
Replace “MyName” with yours…
