Press Enter, type your Mac's administrator password, and press Enter again. Type Y to confirm that you want to erase the drive.
Type the following command exactly as written and press Enter: softwareupdate --fetch-full-installer --full-installer-version 10.12.6 work download macos sierra 1012 6
Wait for the process to reach 100%. You can now boot your Mac from this drive by holding the key during startup. Troubleshooting Common Download Issues Press Enter, type your Mac's administrator password, and
Enter your system administrator password when prompted and allow the processes to finish copying files. 4. Fixing the "Damaged Installer" Security Error You can now boot your Mac from this
But there is a catch: Apple does not make old installers easily available on the main page of the Mac App Store. This guide will walk you through every legal, safe, and reliable method to download, verify, and successfully install macOS 10.12.6 so that it on your target hardware.
For those keeping track, this was the version that introduced Siri to the Mac and enhanced the "Continuity" features between Macs and iOS devices, like Universal Clipboard and Auto Unlock with an Apple Watch. It's also the last version of macOS to be called "OS X".
This is where 10.12.6 shines. I tested it for a typical workday: Slack, Zoom (legacy version), Microsoft Office 2019, Safari 11, and Lightroom 6.
