#MACOS SIERRA WON T INSTALL INSTALL#

Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can not be used.Īlternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.ġ - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.Ģ- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive.ģ - It will present options > Disk Utilities > View > View ALL attached Drives.Ĥ - Choose the Upper Most Drive ( not the volumes indented and list below ).ĥ - Formatting for macOS 10.13 High Sierra and below requires HFS Journaled with the GUID Partition MapĦ - Once that is done > backup out of Disk Utilities and choose install macOS.ħ - Follow the prompts and it may automatically reboot several time.Ĩ - Upon a final reboot - Setup Assist will present with the newer version of macOS. Example : Bootable Installer of High Sierra would have to be done on a computer that Qualifies to run High Sierra. This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer.

The Bootable Installer can Only be performed on an Apple Computer To perform this action will require booting from a Bootable Installer. This method will WIPE ALL Data and there is No DATA Recovery - Period. Then suggest the ' Scorched Earth Method '

Macos sierra won t install