I noticed that a lot of SSD
space had disappeared on my Mini and as I knew that I hadn't installed anything much or stored any data I assumed it was related to caches etc and ran Onyx. After it had finished its routines including the maintence scripts and cleaning of both System and User cache it requested a restart which I allowed. It then hung and required a forced restart.
It was a worthwhile thing to do as a lot of space was reclaimed and I haven't noticed any more problems than before but I just wanted some advice as to whether this is a safe thing to do, particularly cleaning the boot cache.