No, Face Detection is disable and Sync whit cloud is disable. I repeat, I use Mac (iMac 5K 2017, CPU i7 4.2 ghz 32 GB Ram and Radeon Pro 580 8GB GPU) and after a test with Activity Monitor, the CPU and GPU levels are very high, the Mac overheats, the fans start and everything Slows. It is an excessive consumption to be used with Lr Furthermore, by creating a new catalog or using Jpg instead of Raw, consumption is always very high. In my opinion there must be some mistake in the design of Lr itself https://forums.adobe.com/people/Ian+Lyons ha scritto Can you check if Face Detection is enabled? Can you check Lr is Syncing with Cloud?. If it's running then use 'pause' option in ID panel at top left of Lr window (see Issues after updating to Lightroom Classic CC 7.2 for more details) Also, run 'Optimise Catalog' from File menu
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