It's probably Filevault—Apple's encryption system. Encrypting data on your computer uses additional storage, and it can go down rapidly in minutes, as you experienced. This is because each and every system file, cache, log, etc. is encrypted, essentially doubling the amount of used space.
A deep scan will immediately begin on your Mac hard drive. The lost or deleted files will be scanned in a while. Once the scan is over, the lost contents would be displayed, and the users can select their lost content and tap on 'Recover' to restore them to their Mac. When you're ready to take the plunge, restart your Mac from the Apple menu and hold down Cmd+R as soon as the reboot starts. You'll be met with an OS X Utilities screen where you can access Time.
On my MacBook Pro 2015, I had this enabled without my knowledge, and my storage was also rapidly decreasing. I didn't know what to do. I discovered the problem when I plugged in power, which is required for Filevault to encrypt data. I wanted to turn it off, but decryption was required—a process that takes hours to complete.
In the end, I reset my Mac to factory settings with a backup of my drive, meaning I could disable this in the setup next time. If this is the problem, try decrypting your drive, and hopefully, you will gain easy storage.
If you don't know how:
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*Go to System Preferences
* Go to Security and Privacy
*Click on File Vault, press the lock at the bottom of the window to authenticate, then turn it off to begin encryption.
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All Filevault does is encrypt the contents of your disk and make one administrator password required to access your files if unaccessible. So if your computer glitches and your password can't log you in, or you forget that password, you cannot access your files at all.
Alternatively, to protect my files, I back up to an external hard drive either manually or through Time Machine. It works great. Apple's Filevault doesn't suit me since I don't have a large hard drive (128 GB) and I am not in a business, so my files do not need to protected in this manner.
I will write a follow up to this if you have any questions. But this should help you. If Filevault isn't enabled, I advise you book an appointment at the Genius Bar to run their diagnostics, because this should not be happening!
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Jan 10, 2017 11:28 PM
⇒ ⇒ BriXen Mac OS