macOS
@macOS
Keyboard shortcuts
| Shortcut | Desc |
|---|---|
| cmd + option + escape | bring up 'force quit applications' menu |
| cmd + shift + 3 | take screenshot of all screens |
| cmd + shift + 4 | take a partial screenshot |
| cmd + shift + eject | lock screen |
Open application bundle
open -a APPLICATION
kernel extensions
# list kernel extensions kextstat -l # unload kernel extensions kextunload -b <id>
Update software
softwareupdate -h
Search help
apple key + ? , search for the help menu
Increase maxfiles for session
::
ulimit -n 4096
Remove launch agents
::
# get launch list
launchctl list
# remove item
launchctl remove <svc>
Use particular nameservers for a domain
Create hosts-style file in `/etc/resolver/<domain>`
See `man 5 resolver`
Flush DNS cache
# On Yosemite+ sudo discoveryutil mdnsflushcache # 10.10.4+ sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
Burn ISO
::
hdiutil burn <image>
List disks
::
diskutil list
Get linked libraries/object files
::
# List shared libraries
otool -L <executable>
.. TODO look more into otool's operations
Create a RAM disk
::
# Replace XXXXX with MB * 2048 (eg a 4 gig is 8388608 (4096 * 2048))
diskutil erasevolume HFS+ 'RAM Disk' `hdiutil attach -nomount ram://XXXXX`
Boot Options
| keypress | action |
|---|---|
| Cmd + r | Recovery Mode |
| Option + Cmd + r | Upgrade to latest compatible macOS |
| Cmd + v | Verbose Mode |
| Cmd + s | Single-user Mode |
| Shift | Safe Mode |
| D | Apple Diagnostics / Hardware Test |
| C | Boot removable device |
| N | Boot from network |
| Option | Startup Manager |
| Cmd + Option + P + R | Reset NVRAM |
Wireless diagnostics
All the neat tools for diagnosing busy channels, noise, etc. are in the 'Window' tab
/System/Library/CoreServices/Applications/Wireless\ Diagnostics.app/Contents/MacOS/Wireless\ Diagnostics
Virtual Memory Stats
vmstat
Links
- https://opensource.apple.com/
- https://github.com/herrbischoff/awesome-osx-command-line
- https://www.raywenderlich.com/151741/macos-development-beginners-part-1
Power management
man pmset
Use caffeinate to prevent the system from sleeping
Power management
man pmset
Use caffeinate to prevent the system from sleeping
Power report
A bunch of dtrace under the hood
/usr/bin/power_report.sh
System/Application defaults
/Library/Preferences and ~/Library/Preferences
man defaults
launch services database
dump database /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -dump #Remove Open With entries lsregister -kill -r -domain local -domain system -domain user
System Preference Panes
PreferencePanes framework
/System/Library/PreferencePanes
System config
scutil - system config utility
- help command in the shell has lots of goodies
- use n.add KEY + n.watch to get notified of config changes
Look for memory leaks
leaks(1)
System Integrity Protection
csrutil(1)
Installing fonts
copy to ~/Library/Fonts