I'm pretty sure that this is related to Apple breaking (and deprecating) OpenGL in Mojave (perhaps not everything was converted to Metal?) because it's EXACTLY the same issue I noticed with another, completely unrelated application called Slic3r PE (and to a lesser extent with OpenSCAD): it worked fine on 10.13, but became horribly slow on 10.14. Tried creating a new catalog, tried deleting all preferences, etc. Same here, on an iMac 5K (2017) with a quad i7 CPU, 24 GB of RAM and 8 GB of VRAM on macOS 10.14.2. Maximum thread count used by Camera Raw: 5Ĭamera Raw SIMD optimization: SSE2,AVX,AVX2Ĭamera Raw virtual memory: 1105MB / 8191MB (13%)Ĭamera Raw real memory: 1149MB / 16384MB (7%) Virtual memory used by Lightroom: 4,947.6 MB Real memory used by Lightroom: 2,594.5 MB (15.8%) Real memory available to Lightroom: 16,384.0 MB There is more info below, but I hope I've covered the bulk of it. These make a slight improvement to the lag but still don't sufficiently fix the problem - adjustments are still delayed. I've tried enabling Smart Previews and "Use Graphics Processor" in the preferences tab. But I've seen a few other people struggling with similar issues on older machines than my own. My overall machine performance hasn't suffered since OS Mojave. The slider is unable to keep up with the speed of the mouse, and therefore I can't see my adjustments in real time, making the whole editing process much slower! I've had Mojave installed for a few days now and I'm now noticing significant slowing down issues in Lightroom Classic.įlicking between photos in the develop tab has slowed, but more importantly I'm noticing major lag when tweaking the adjustment sliders.
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