For the moment, firmware versions for updated Macs are different between those running Catalina, and those running Mojave earlier. How could this affect Sierra, though?
Using only free tools, it isn’t difficult to get a log excerpt which will tell you, or someone else, exactly what occurred at the time.
When Catalina is released, Apple is expected to drop support for macOS 10.12 Sierra. What should you do if that’s what your Mac is running now?
A utility to explore your keychains, revived, improved a great deal, and now compatible with Catalina.
Downloading runtime support from Apple can save you wondering why a tool appears to be broken.
New version should address long delays in checking old Finder Alias files.
How can you check all your old Finder Aliases to see which are broken and, more importantly, which are in danger of breaking?
What went wrong with macOS 10.14.6 update, and Sierra and High Sierra Security Updates 2019-004?
Apple has released fixed versions of the Sierra and High Sierra Security Updates 2019-004, which it first released […]
Why couldn’t you install Security Update 2019-004 on your T2-free Mac, when the problem was in its T2 firmware update?