What does it take to install a recent version of an older macOS on an external disk, in Golden Gate? Something of an epic journey through the past, resulting in disappointment and frustration.
install
Do you want to install an older version of macOS on an Apple silicon Mac running a more recent version? You may have problems achieving this in Golden Gate 27.2, but here are the full instructions in detail.
First decide what you want to ‘clean’: the Data or System volume, or firmware? Then consider the methods of choice to perform that. Explained for Intel and Apple silicon Macs.
Can you install macOS Sonoma on an external SSD for an Apple silicon Mac running Sequoia 15.3.2? So far this has defeated two of us on many attempts. With useful tips that should have brought success.
From Installer packages and metapackages, to the first for Big Sur with its new boot volume group. RSRs and their demise, and when an upgrade is an update.
Installing and maintaining Mac OS 9.1 was a complex process that could easily occupy you for several hours getting all its components right.
Recovery reinstall, using an Installer app, or a bootable installer, or with an Apple silicon Mac in DFU mode? What the choices are, and how best to do it.
If you normally ‘clean’ install a new version of macOS, how can or should you do that with Sonoma or another recent version on a modern Mac?
Complete step-by-step instructions for installing a new copy of macOS to an external disk, making it bootable. For Intel and M1 Macs of all flavours.
Why would you want to go to the lengths of erasing your startup disk and installing a macOS upgrade clean? Here’s why, and how to do it.
