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I'm finding a there's a big difference between processing large RAW files* when using the new masking tools in PS ACR vs. LR Classic although ostensibly they are the same. *(specifically 61 & 42MP Sony ARW compressed RAW files) I'm also having other weird issues in LR Classic. Advice urgently needed. Here are the issues: 1. In LR Classic, where I do most of my work, LR is much more likely to crash or take an inordinate amount of time when I'm working with masks, especially if I'm using the brush tool when masking. It can take several minutes to show a single brush stroke (if it doesn't crash altogether). I'm much less likely to have those issue when doing the exact same thing in Photoshop ACR. I can't fathom why there's a difference. Anyone else having these issues? It's especially apparent when working on 61MP RAW files from my Sony A7riv, and less so but still problematic when processing files from my Sony A7rii. It's so much more convenient not to mention nondestructive to mask files in LR Classic, especially since, given health issues, I'm mostly shooting in my garden, if at all, and it's such an easy way to blur the background and should mean I can process quickly. Working in LR also meansthe changes are in the RAW file, which I can go back to later and change. This way I don't have to make PSD or Tiff files but can simply use the the RAW file to make jpegs in whatever color space(s) I need (i do this in Photoshop so I can check the color, check that there are no blown whites etc in an srgb version, but I don't save a Tiff unless I find dust spots I missed in LR). Having to make initial edits in PS is slower and it means I must make a layered PS file in case I need to re-edit, or in case a client needs a Tiff, instead of having those changes in the RAW file. I'm working with a late 2018 Macbook Pro (purchased Feb 2018 and given a new battery & keyboard & a fresh OS install by MAC in Feb 2021 when I had some issues), so much of it is new. It's got an 6-Core i9 processor, dual graphics cards (set up as Adobe instructed), 32GB RAM. I've got over 200GB free space on my internal SSD, and am running Mac OS Monterey 12.6 - any suggestions as to what I may be doing wrong? These specs more than meet the highest recommended LR system requirements. 2. Can LR Classic handle large RAW files? I honestly love my A7riv and it works much better than the A7rii (longer battery life, rear touch screen), but I find a significant difference in the time it takes to do certain things when I'm working on a 61MP file vs a 42MP one - not surprising as the former is twice as large. I spent a small fortune switching to the Sony eco system and the files are beautiful - great color, sharp, low noise even at high ISOs. I really wonder if the problem lies in LR Classic itself, since PS has no issues, (it's slow saving flattened tiffs but saves much larger multi-layered PS and even PSD files in an instant), which is why I can't help but wonder if a new Mac would really make any difference or if the problem lies in the program itself. LR Classic also seems to crash a lot. It rarely ever crashed before the introduction of masking. 3. Now it crashes even if I'm just trying to cull files which is also achingly slow - and I give it lots of time to be sure all my previews (smart and full size) are completely built before I try to start culling. 4. I also often get this message in LR Classic "There was an unknown error while writing metadata to this photo. Retry?" Sometimes Retry works, sometimes it doesn't - I randomly get the message with an "!" next to one or more photos but not while I'm actually asking it to write metadata to a file. Anyone else experiencing this? So, given these issues: Do I need more space on my SSD? I'd gotten it to 600GB free and was still having the same problems. Should I upgrade to macOS Ventura - will that help? Any experience with the upgrade and working with LR Classic and PS? Do I need a new Mac? - the recommendations by Adobe would seem to indicate not. Any suggestions greatly appreciated. (And any experience working with files from the Sony A7riv or similar especially appreciated)