Dear Forum,
I am not sure what to do or where the mistake could be.
Old Imac 2013 with FusionDrive now iMac Pro with SSD.
Cloned the system with SuperDuper
The scrolling and the move from one picture to the next is slow.
I am on Mojave with the latest PM Build.
Could it be a problem with the 5K Display
Best Dirk