Can I delete my adobe camera raw 2 cache files on my iMac without it affecting anything in lightroom? I dont want to delete them and then realise it has an effect on my current projects in lightroom.
It’s totally OK to delete Camera Raw cache files.
It’s also OK to delete the Lightroom Classic previews cache (…Previews.lrdata) if it becomes extremely large.
Because both are caches, if deleted they will automatically rebuild themselves as needed using current edit metadata. They do not affect your original files in any way; like many other caches on your system they are used to boost performance.
What does affect your Lightroom Classic projects is if you delete the catalog (.lrcat) file or the original photo/video files, so don’t delete those.