Check which system version you have
Choose Apple menu → About This Mac: the version and its name are at the top. In Terminal, sw_vers prints the version number and build.
Without Terminal
- Click the Apple menu in the top-left corner.
- Choose About This Mac.
In one command
Version and build number:
sw_versOr just ask Titan
Which system version am I on, and is there an update?Do it with Titan
Titan is an AI that lives on your computer: tell it what you need and it does it while you watch — you press Return, nothing runs by itself. What is Titan?
Titan isn’t on this computer yet. Get Titan, then press the button again — the task will be waiting, typed in.