While using a variety of apps in MacOS15 beta 6 & 7 they will freeze. It seems like they happen when you stop typing in Pages or while doing something Preview. Forcing it to quit and restarting sometime allows sometime more progress but it is very slow. Printing is unworkable.
This first started in Beta 6 and I hoped Beta 7 would fix it but no, it seems to be worse. I'm using a Mac M2 Mini with 24 Gb of memory.
No problems with Mail or Safari.
Haven't tried working with Xcode