When you can’t install what the App Store offers: solutions for downloading and installing older versions of macOS for use with Catalina.
When the Installer refuses to complete an installation package containing kernel extensions, here’s how to fix the whitelist so that installation works.
You’re running High Sierra, but SystHist reckons you installed Mojave, and have recently applied High Sierra security updates. Isn’t it wrong?
Practical tips for those intending to upgrade early, from checking compatibility, preparing workarounds, to making a copy of the installer.
An odd problem: you try running an old installer and it crashes. There’s nothing actually wrong with the installer, it’s just that the rules have changed.
macOS can update files protected by SIP without your knowledge of any update taking place, and without the event being recorded in the Install History. Here’s how it happens.
Here’s how to find out just what that last update installed, so you can remove it manually if necessary.
What does the Supplemental Update do to the High Sierra installer? An exploration using the installer, an external SSD, and a bootable USB memory stick.
The High Sierra upgrade did not go well for many users. Here are some of the reasons why macOS 10.13 is currently a lemon.
If you want to format your startup volume before upgrading, or install High Sierra on multiple Macs, it is best to use a bootable installer. Here’s how.