Pretty sure Darktable only supports openCL and not Metal for MacOS.

OpenCL is unsupported for M1/2/3/4/5, which makes RAW file processing, batch workflows, basically everything, unusably slow.

Unless something has changed in the past few months, Darktable is dead on MacOS with no fix in sight.

I use it on Mac - I didn’t notice too much. There’s some GPU usage, I assume Apple still has some deprecated OpenCL drivers kicking around that it knows to use.

I used Darktable on Mac yesterday