macOS

The Unix-like operating system that runs on Macbook computers. Long known as "OS X".

Cheatsheet

Launchd

See wiki/launchd

Keyboard shortcuts

Navigation

• Switch between windows: Cmd + Tab
• Switch between windows of the current program: Cmd + Backtick
• See all open windows: Ctrl + Up
• See all open windows of the current program: Ctrl + Down

Screenshots

• Take a screenshot: Shift + Cmd + 3
• Take a screenshot of part of the screen: Shift + Cmd + 4

Finder

• Go to file: Ctrl + Shift + G

Other

• Open emoji menu: Ctrl + Cmd + Space

Flush DNS cache

sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder

sandbox-exec

$ sandbox-exec -f restrictions.sb CMD ARG1...
$ cat restrictions.sb
(version 1)

(deny default)
(allow process-exec)
(allow sysctl-read)
(allow file-read* (subpath "/"))

• https://igorstechnoclub.com/sandbox-exec/
• To view violations in real-time: log stream --style compact --predicate 'sender=="Sandbox"'

Make a file downloaded from the Internet executable

xattr -d com.apple.quarantine path/to/file

Set default application to open file type

Find a file of the desired type, click "Get Info" in Finder, and use "Open With" section.

Can't eject drive because it is in use

• The volume can't be ejected because it's currently in use
• How to eject my external drive when my Mac refuses because of Spotlight?
  • diskutil unmount force /Volumnes/ian-ssd-t7