Pezza24
Regular.
I did upgrade the OS a year or two ago as I was still stuck on something like Sierra. I may have to spend some time doing it again in the short term as a lot of the laptops I'm looking at won't be available for a few days. Probably worth deleting all the poker apps I've got on the thing tooIt might be possible that a compete reinstall of the operating system on your Mac book might fix the crashing.