AO trial version causing SK2021 on mac to crash

I have a mid2012 macbook pro operating system catalina 10.15.7 running sketchup 2021
Downloaded the trial version of Ambient Occlusion and installed using extension manager.
Every time i attempt to use the plugin sketchup crashes. Any ideas on why this is occurring would be appreciated. Recently become interested in producing rendered sketchup models and trialling rendering plugins.
I have just read a post on the forum saying that ambient occlusion requires version 11 of the mac operating system. I may have to update my hardware to get into rendering.