Betreff: Premiere 2019 timeline lag on iMac Pro 27"
I dont know I find this absolutely not a solution for this issue. I'm running the latest Mac OS and Premiere Versions on a brand new Mac Pro and still my timeline is extremely laggy and low FPS when I just scroll through it, or try to drag a clip around.
This is an Adobe issue with HiDPI displays. If you force the app to launch in lower resolution it works fine, but that's not a solution by any means.
I have this issue in After Effects, Premiere and Lightroom, basically every app where scrolling needs to be done. The issues have persisted since YEARS, already on my old 6.1 mac pro with 5k Displays attached. I always thought it was the old GPU not capable to handle things and upgraded primarily for that reason. Well. Sadly the problem lays with Adobe, not with my hardware as it seems.