Thanks all for your suggestions/replies.Nothing fixes it for now. I accept that due to the single threaded nature of the UI that there will be glitches��occasionally, and when you are using low level interfaces.The weird thing is this happens after restarting, when everything should be pristine!Cheers,StewartOn Thu, Apr 28, 2022 at 9:41 PM Noury Bouraqadi <bouraqadi@gmail.com> wrote:I've got it too with P9 when I leave an image open for a while. I becomes unresponsive and I have to kill it from the Mac OS "force quit" popup.Hppened to me with the Pharo launcher too.NouryOn Apr 28 2022, at 3:47 am, Yanni Chiu <yannix7db@gmail.com> wrote:Try switching focus to another app on your Mac (e.g. Finder or web browser), then back to Pharo��On Wed, Apr 27, 2022 at 8:44 PM Stewart MacLean <stewart@xtra.co.nz> wrote:Hi,[Pharo 10 on Mac Monterey]Due to the multi-process nature of Bonjour that I'm attempting to interface to, I am crashing the system ALOT as it disappears down a black hole and I try to figure out the cause.However, I've noticed that most of the time when I restart Pharo it is unresponsive to clicks and I have to relaunch Pharo AGAIN! Argh....!The mouse moves but no one is at home. Right click brings up menus, but they don't respond.As I move the mouse, list items are highlighted.As this is a completely new OS process, I'm wondering what is causing this behaviour?Has anyone else experienced this, or have an explanation?Cheers,Stewart