How to trigger lid close action programmatically?

Is there a way to trigger the lid close action programmatically with a script or through terminal?

I am testing this by placing a small magnet near the SD slot on my MacBook Pro.

Solution 1:

There is no Apple supported programming interface to simulate the lid being closed.

You can put your Mac to sleep using this command line:

osascript -e 'tell application "System Events" to sleep'

Solution 2:

You may put your machine to sleep with a shell script:

pmset sleepnow

P.S. If you intend to run this from a script, be prepared that machine won't sleep until script finishes, and if that's something like a daemon running in a loop, it won't ever work unless you run pmset in a subshell:

(pmset sleepnow &)