@krm208, welcome to the Layout Issue Fan Club. Hope your frustration is just starting to peak as the more the merrier on this issue. More noise equals more chance of a fix.
Part of another thread on the same issue. One user wrote this:
“I’ve posted a couple times (and had a few conversations with Colin) about LO2020 performance. I use a completely maxed out 2019 MacBook Pro w/Catalina. The LO performance issue is NOT the hardware. Something was changed when they re-wrote LO2020, and it seems to have everything to do with the way layout treats the SketchUp objects in viewports.”
As to a fix? Haven’t heard a date or release for that. Mostly why I’m commenting because I want to follow this one in case someone comments.
other thread link…Layout to Slow