My Mac mini behaves in strange ways. Certain applications open randomly, downloads just don’t download sometimes, for a while I could not empty the trash, etc. I want to cleanly erase everything that my computer is including the kernel, Hardware, SMC Recovery firmware and everything else and just put back fresh operational replacements. I am not looking to buy a new computer (like other questions here said to do) I do not know which one or couple of things is corrupted but I want to just get rid of everything and start over without bricking my computer. Any ideas?

  • What model year is the Mac? What version of macOS do you have installed? Dec 14 '19 at 21:09

Restart the machine, while holding ⌘ Command⌥ Option R. The option key gives you the latest supported version of macOS rather than what it shipped with. Then follow the prompts to reinstall a new macOS.

As long as you have a backup of your needed documents and settings I would also erase the drive with disk utility within the process of reinstalling, that will ensure nothing is left over from a potentially damaged OS install.

  • Thanks, @Steve Chambers. That's indeed improved. Dec 15 '19 at 0:55
  • Thanks! But will that also reinstall the kernel? A friend of mine said that based on the behavior the kernel might be corrupted
    – fall3n
    Dec 15 '19 at 17:27
  • Yes, the kernel will be replaced. It's part of the operating system. Dec 15 '19 at 17:29

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