Hi folks, I have a old iMac, 2011, with 12GB of Ram. I find that to get the best of Photo RAW, I close all other non essential programs, so that the only main program running is Photo RAW. Before I start the program I flush my memory to ensure I have enough. I use Clean My Mac, but are are plenty of other programs that can do this. I also flush my memory after every image edit. This approach works for me.
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