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This will start the OS X installer from the CD/DVD on your Mac. hold down the Command + R keys (Reinstall the latest macOS / OS X that was installed on your Mac, without upgrading to a later version) or hold down the Command + Option + R keys (Upgrade to the latest macOS / OS X that is compatible with your Mac) or. If your Mac is using a firmware password, you're prompted to enter the password. To boot into Recovery Mode, on startup: hold down the power button - Apple Silicon Macs only.
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macOS Recovery installs different versions of macOS, depending on the key combination you use. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet. OS X Mountain Lion brings a lot of great things from iPhone, iPad, and iPod touch to the Mac. Command ()-R: Start up from the built-in macOS Recovery system. When the startup music is playing press and hold the C key from the keyboard. Mac OS X Mountain Lion (version 10.8) is the nineth major release of Mac OS X (now named macOS), Apple’s desktop and server operating system for Macintosh computers. The one suggestion Ive found so far that seemed like it. All result in the same Mac OS X is not supported on this platform message. The computer has recently had its HDD and GPU replaced with factory OEM parts. Open your Mac or restart the device if you were already using it. Confirmed the following flags were set in CCs Boot section - Verbose (-v), dart0, debug0x100, & keepsyms1 Tried 5 different SMBIOS profiles - iMac 18,1, iMac 18,3, iMac 19,1, iMacPro 1,1, and MacBookPro 15,1. After the spinning globe shows up, the machine will refuse to boot and will stay like that for hours if you let it. Unable to boot Mac even into macOS Recovery mode Quite a frustrating situation to be in, right Sometimes, Apple repair tools don’t boot when you need them the most. The machine will post when it is turned on and I hear the chime, but once the progress bar gets about halfway, the screen will flicker and a spinning globe will come up above the progress bar.
#BOOT INTO RECOVERY MAC OS X 10.13.6 INSTALL#
I am working on this computer for someone else they brought it to me after they tried to install OS X High Sierra. I have been dealing with this issue for several days now and I feel like I have tried everything that I could find on the internet.