Pro 2019 just about locks up mac mojave, last years version worked fine. @019 works fine on older MacBook pro with Mojave
memory use goes through the roof even when background apps shut down
removed and reinstalled SU a fw times with same result
What background apps? Air server?
Duet? Those gave me some problems, but 3D connexion is the usual suspect. ( I helped someone the other week who had ‘tried’ it, but not deinstalled.
What extensions do you have installed in SketchUp?
Unfortunately, 3DConnexion has a long history of not solving memory usage issues with SketchUp on macOS.
As noted in the links Colin provided, the problem doesn’t happen on every Mac and doesn’t happen every time on a single Mac. I am firmly convinced there is a race condition in the initialization of their driver for SketchUp, that is a situation that arises only when a certain relative timing of events occurs during SketchUp launch. That kind of error is notoriously difficult to debug because it doesn’t repeat reliably. I have a lot of extensions installed, which makes the SketchUp startup take a lot of time, and that seems to aggravate the problem. I love the Space Navigator when it works so I have learned how to notice when the memory hogging occurs and how to restart SketchUp to avoid the problem.
For your interest, in my recent case I had kernel_task using 600% CPU. It seems to have started when I added a new user to macOS (I was helping on the Los Angeles bootcamp, and wanted to be able to lend my Mac to anyone whose machine broke down). In adding the new user I ended up with two copies of Bitdefender running all of the time. That is, as soon as it finished a virus scan it started another one.
I uninstalled Bitdefender and restarted. Ended up with still having one Bitdefender going, but at least kernel_task was back down to about 10%.