https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/m-p/14401612/page/15#M355481 It turns out that the GPU in my trashcan mac is no longer supported, and GPU acceleration causes weird artifacts to happen in develop mode. If anyone else runs into this problem try turning off GPU acceleration. Meanwhile, I guess it's time to start a casual search for a good used Apple Silicon machine. -- Larry Colen lrc@red4est.com sent from ret13est

Yeah I finally had to bite the bullet and replace my cheesegrater Mac Pro when I could no longer keep it current enough to handle the OS updates. Don't recall having the artifact issue, though. On 2/5/24 2:20 PM, Larry Colen wrote: > https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/m-p/14401612/page/15#M355481 > > It turns out that the GPU in my trashcan mac is no longer supported, and GPU acceleration causes weird artifacts to happen in develop mode. If anyone else runs into this problem try turning off GPU acceleration. > > Meanwhile, I guess it's time to start a casual search for a good used Apple Silicon machine. > > -- > Larry Colen > lrc@red4est.com sent from ret13est > > > > -- > %(real_name)s Pentax-Discuss Mail List > To unsubscribe send an email to pdml-leave@pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

> On Feb 9, 2024, at 1:08 PM, Doug Brewer <doug@dougbrewerphoto.com> wrote: > > Yeah I finally had to bite the bullet and replace my cheesegrater Mac Pro when I could no longer keep it current enough to handle the OS updates. Don't recall having the artifact issue, though. If by "cheesegrater" you mean a 5,1 rather than the current mac pros, they stopped working with Lightroom long before this problem cropped up (lightroom 12 seems to be the start of it). I was able to get mine to limp along for a few extra years, but eventually it just got to be too much. -- Larry Colen lrc@red4est.com sent from ret13est