If you're terribly lucky your disk drive (or SSD) is not on the far side repair and you may be ready to fix the matter yourself and so get access to your files. If your drive has issues and you become alert to this before the machine crashes, or if you manage to urge it up Associate in Nursingd running once more (or within the case of a drive your waterproof is ready to find it), the primary issue to try and do is launch Disk Utility.
Open Disk Utility - You’ll realize this within the Utility folder, within your Apps folder, or by finding out it exploitation Spotlight Search. (Press Command+Space to trigger this).
Click on the disk you're involved in from the list on the left, and so click attention. You can see a message indicating that attention will check the quantity for errors. it'll then repair the quantity if necessary. You will see a warning that attention has to temporarily lock the boot volume. this suggests that whereas attention is running apps will not be responsive. the method in all probability will not take long. If throughout the method Disk Utility detects any problems and it's simply fastened, then it ought to be resolved quickly.
If you are able to fix the hard drive or SSD in your Mac (or an external drive) using Disk Utility you will hopefully be able to recover your files. We suggest you back up your Mac at this point before running the risk of the disk failing again.