It can be useful to retrieve information about a Mac from the command line. For example, if you have booted into recovery mode or to an installer, or you have done a remote SSH session to another computer.
This command shows piles of stuff, but is slow: system_profiler
Shows lots of system paramaters, fast: sysctl -a
Show running OS version: sw_vers
Show OS version on disk: cat /Volumes/Macintosh\ HD/System/Library/CoreServices/SystemVersion.plist. Note: Assumes disk is called "Macintosh HD".
Show free space on volumes: df -H
Show model number only: system_profiler SPHardwareDataType | grep 'Model Identifier'
I usually write a blog post about once a week. The latest post can be viewed here: Think for Yourself: In the end, everything is just an opinion. Be skeptical, and think for yourself! (posted 2026-04-25 at 21:12:02). Or go to the Home Page of My Blog to choose a post to view.
I do podcasts too! You can listen to my latest podcast, here: OJB's Podcast 2026-04-25 Think For Yourself: In the end, everything is just an opinion. Be skeptical, and think for yourself! Or subscribe to my podcast RSS feed, on my RSS Feeds page.
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