MacOS Monterey to be released 25-October-2021

  I have been running the beta release of macOS Monterey for a few months. A recent update to macOS 12.0.1 indicates more might be a follow on.

 An issue for older MACS might be the amount of free disk space required to load and perform the update.

 MacOS keeps a reserve of recently used files. When you attempt to load and perform the update that cache may prohibit the update. There are programs on the Internet to work this space issue. The ones I tried didn't work releasably, were more advertising, etc.

 If you see this when attempting to update:

read on. 

 A technique to flush the disk space held for recent file operations is to create a large requirement for disk space, then remove that temporary file.

 You can do this with the macOS terminal utility. You will need to invoke the terminal utility with Administrator access. Then use the dd command to create the temporary file, delete the temporary file when all free space gets exhausted, reboot, then attempt the update again. If your update fails due to free disk space issues you will need to free large files.