Download MacOs sierra.
Any here can show where to download MacOs Sierra???
Apple Vision Pro is now available in the U.S.
Any here can show where to download MacOs Sierra???
If upgrading your OS, check to make sure your applications are compatible. PowerPC applications are no longer supported after 10.6.
macOS Sierra 10.12: Compatible Apps
Also check to make sure there is a compatible driver for your printer.
Do a backup before installing, preferable 2 backups on 2 different drives.
Download MacOs sierra.