Quote:
...The other alternative is to add one of the Linux OS's to my VM Fusionware and use GIMP on that but I would have to relearn a lot of things such as how to add brushes and scripts...
In case you decide on that option.
Linux distributions are very easy to install, even with a slow (virtual machine) it rarely takes more than about 20 minutes. No re-boots like Windows.
Installing scripts and plugins, is probably easier than on your Mac.
A look at a typical Gimp installation in linux.
https://www.youtube.com/watch?v=U02lm64tnCQ 10 minutes