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Enable root
$ csrutil status
System Integrity Protection status: enabled.
$ csrutil disable
Reboot
dev tools
# Homebrew package manager
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install iterm2 # iTerm2 - improved terminal
brew install zsh # zsh - improved shell
Old files cleanup
$ sudo rm -rf /Library/Updates/* # macOS old updates files
$ sudo rm -rf "/System/Library/Desktop Pictures/*.heic" # macOS default wallpapers