I reinstalled the latest drivers from them and lo and behold, the problem was replicated perfectly. Uninstalled and stable again.

Will write to them. They definitely need it sorted.

Thanks again.

By Jove I think you've got it in one!

Uninstalled 3D Connexion and so far it appears as stable as a rock.

Many many thanks.

Cheers - Gregor

Yes I am. I'll uninstall and check what happens

Hi there

We just upgraded an iMac to a new model with 24Gb of RAM.

Sketchup seems to be grabbing memory and not letting go. It got up to 98.5Gb!

anybody seen this?

I reinstalled Sketchup with no difference.

2018 iMac running High Sierra 10.13.6

Thanks - Gregor