Make the folder icon in Finder appear immediately on hover:

defaults write -g NSToolbarTitleViewRolloverDelay -float 0

Change the number of apps per row/column

The default values are 7 and 5.

defaults write com.apple.dock springboard-columns -int 10
defaults write com.apple.dock springboard-rows -int 8
defaults write com.apple.dock ResetLaunchPad -bool TRUE
killall Dock

Mission Control → deselect “Automatically rearrange Spaces …”

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Automatically show expanded view of print dialog (requires reboot)

defaults write -g PMPrintingExpandedStateForPrint -bool TRUE

Disable Shadow in Screenshots

defaults write com.apple.screencapture disable-shadow -bool TRUE && killall SystemUIServer

Autohide Delay

The delay between moving your mouse to the bottom of the screen and the dock actually appearing. 0 means instantly.

defaults write com.apple.dock autohide-delay -float 0 && killall Dock

Autohide Speed

The speed at which the dock appears

defaults write com.apple.dock autohide-time-modifier -float 0.4 && killall Dock

Make the Icons of Hidden Apps Transparent

When you hide an app (via Cmd + H), the app icon in the dock will become transparent.

defaults write com.apple.dock showhidden -bool TRUE && killall Dock

macos-defaults.com

launchctl — Interfaces with launchd

launchctl interfaces with launchd to manage and inspect daemons, agents and XPC services.

launchctl list

launchctl list | grep -i <search-term>

launchctl remove <full-application-name-from-list>

Set Mouse Speed

• To read the current setting:

  defaults read -g com.apple.mouse.scaling
  

• To override the setting:

  defaults write -g com.apple.mouse.scaling 12.0