Mac Tips

defaults write com.apple.dock static-only -bool TRUE; killall Dock

reduces the dock to active apps only (-bool FALSE reverses)

http://www.syniumsoftware.com/cleanapp is a trustworthy program for completely removing an application from OS X. Simply moving the app to the wastebasket will often leave a host of associated files in various libraries still around. Cleanup does a good job in detecting the locations of such files and removing them all.
After a recovery boot, Once Terminal is open, simply type /Volumes/DW/Go to launch DiskWarrior
To run hardware diagnostics on a Mac Laptop where the built-in screen is faulty, connect
1. An external monitor,
2. An external keyboard (or Bluetooth keyboard). To pair a Bluetooth keyboard, you can use another Mac to connect to the faulty unit with a command such as vnc://name-of-faulty-laptop._rfb._tcp.local Enter this command into the Safari Web browser of the remote computer. However, VNC cannot be used to run hardware diagnostic tests.
3. An external mouse.
4. Reboot and then close the laptop lid. The primary screen should then appear on the external monitor. Using the external mouse, reboot the system and thenquicly, using the external keyboard, hold the d key before the boot starts. This should produce a hardware diagnostics screen on the external monitor. Use this to run diagnostics via the external mouse and keyboard.
5. An alternative to closing the laptop lid is to run the terminal program (if necessary connected from a remote computer using the vnc command above) and enter the command: sudo nvram boot-args="iog=0x0" and then reboot. When the system comes up, only the external monitor will be active. Reverse the command using sudo nvram -d boot-args
6. For more, see https://www.cultofmac.com/176329/turn-off-internal-lcd-display-of-your-macbook-air-os-x-tips/
A more comprehensive diagnostic set can be run using: sudo sysdiagnose -f ~/Documents (where the output is directed to eg the documents folder) but interpreting this output is non-trivial.