Layers toolbox frozen

[rich2005]

(01-17-2017, 11:52 AM)rooftoof Wrote: It's 2.8.4 and I'm working on macOS Sierra 10.12.1

Not many (any) Mac users here: You might need to update GIMP. Some references which I am sure you have already seen.

http://forums.macrumors.com/threads/gimp...a.2017341/
https://www.macupdate.com/app/mac/14597/gimp

You could try asking the question on the gimpchat.com forum where there are some OSX users.