Of all the utilities that can keep Macs clean and tidy, CleanMyMac is probably the best. It can be bought as an annual subscription or as a one-time perpetual license.
But remember, CHKDSK won't help if you're dealing with a physically damaged hard drive (after dropping your laptop, for example), but it can be great for correcting minor errors. Tech Support – stay ...
and pairing it with the Mac again, seems to fix things in some reported cases. So, give those standard tricks a whirl, but other than that, keep your fingers crossed that this is on Apple’s ...