In any RAW editor, each time you modify a development setting, the RAW engine has to fully re-compute the preview (well, not always but often). Depending on the processing power of your system (GPU+CPU), this computation may takes time. Until it is finished, only a low quality preview can be displayed.
This should not be happening on a MacMini M1. Plus your 20MP Olympus files are not that large. I never have this problem on my Macbook Air M1 with 8 GB ram when processing 45MP Canon R5 Files. So I would say it is not the computer that is causing the problem. Processing power should be more than enough. Unfortunately I don’t know what to suggest. Hopefully someone else here will.
tpytlarz
(Olympus, Mac mini M1, PL6 Elite, Nik4)
7
Thank you everyone. I did change to prefer highest preview quality. Funny, but I remember actually shutting this off because it was causing another problem I had. That is choosing a folder and not having previews load. There were placeholders for the images but they all had that circle with arrows on all or most of them. Took forever to load. But I may have since updated to the mac mini and I don’t remember if I was using my older iMac when that problem occurred. I will monitor using higher quality previews and see if that issue comes back but for now it seems to work fine. Again, thank you.