



I have used Thunderbolt, USB 3, put preview folders on different. I want to add, if you open the app in low resolution through the right click/info menu, it's so much smoother, but obviously that's not a feasable solution, it just points at that this is really a coding issue on Adobe's end. I have done these settings and my MacBook Pro starts to slow down after editing a 30 sec spot. It‘s worse when you actually experience this yourself. There‘s a huge thread about Lightroom over in another Adobe Forum by frustrated iMac Pro owners. Other apps, After Effects and Lightroom Classic are also affected by this. Other software, like Final Cut, manage the same performance on the new machine on a 5k Display, but not Premiere. I run Davince Resolve Studio (paid version) 17.1 on a Windows 10 machine, Intel i7-8600 + SSD + GeForce 1070. The same project on a 6 years old trashcan Mac Pro with 3xFull HD Displays runs absolutely like butter. Simply scrubbing the timeline, or moving a clip around is so sluggish and slow, it‘s just god awful. Sadly, this has absolutely not been the case. I just got a brand new Apple Mac Pro with the 32 GB Vega II GPU and was hoping it would finally bring smooth UI performance to my 5k Display in Premiere.
