Why is my Mac so slow? Check the disk firstWhy is my Mac so slow or slow to start up? Most often the disk is nearly full. How to check free space, login items, memory and the disk itself.
How to clear history on MacHow to clear history on Mac in Safari, Chrome and Firefox, for the last hour or all time, and what else disappears, including on your iPhone.
How to print screen on MacHow to print screen on Mac without a Print Screen key: Shift-Command-3, 4 and 5, where screenshots are saved and how to copy one to the clipboard.
How to create a folder on MacHow to create a folder on Mac: File › New Folder or Shift-Command-N, a folder on the desktop, New Folder with Selection, and why New Folder is dimmed.
How to clean up your Mac: delete junk files safelyHow to clean up your Mac with MacWashing: find caches, logs, old installers and leftovers of deleted apps, see what each takes and delete it safely.
How to downgrade macOSHow to downgrade macOS to an earlier version: get the installer, make a bootable USB drive, erase the Mac, install and restore your files.
How to unzip files on Mac and zip themHow to unzip files on Mac with a double-click, how to zip a file on Mac with Compress, password-protected zips, and what to do with RAR and 7z.
How to clear cookies on MacHow to clear cookies on Mac in Safari, Chrome and Firefox, for one site or for all of them, and what changes after: you get signed out of sites.
cargo clean: how to clear the Cargo cache on MacWhat cargo clean deletes, how to clear the Cargo cache in ~/.cargo on a Mac, and how to free the space taken by target folders of old Rust projects.
How to open Terminal on Mac and use itHow to open Terminal on Mac with Spotlight or Finder, open it at a folder, run the first safe commands and stop a command with Control-C.
How to clear temporary files on MacWhat temporary files are on a Mac, how to clear them safely (a restart does most of it) and which temp folders you should never delete by hand.
How to clear Spotify cache on MacHow to clear Spotify cache on a Mac in Settings › Storage, move the cache to another disk and keep your downloaded music.
How to back up a MacHow to back up a Mac with Time Machine to an external drive, why iCloud Drive is not a backup, and how to restore with Migration Assistant.
How to clear Firefox cache on MacHow to clear Firefox cache on Mac and keep your sign-ins, bookmarks and passwords: the Clear Recent History window, one site’s data, and what not to delete.
How to clear Telegram cache on MacHow to clear Telegram cache on a Mac in Telegram and Telegram Desktop, and how to limit it. Your chats stay in the cloud.
How to type emoji on MacHow to type emoji on Mac: Control-Command-Space or the Globe key opens the emoji picker. Search, skin tones, favorites and the Globe key setting.
How to undo on Mac: Command-Z and redoHow to undo on Mac with Command-Z or Edit › Undo, redo with Shift-Command-Z, undo a file move or delete in Finder, and go back to an earlier version.
How to right click on MacHow to right click on Mac: Control-click, a two-finger click on a MacBook trackpad, the right side of a Magic Mouse, or any two-button mouse.
How to switch between windows on MacHow to switch between windows on Mac: Command-Tab between apps, Command-` between windows of one app, Mission Control, App Exposé and Stage Manager.
How to check battery health on MacBookHow to check battery health on a MacBook: Maximum Capacity and condition in Battery settings, the cycle count in System Information, and Apple’s limits.
What is System Data on Mac and how to reduce itWhat macOS counts as System Data in Storage settings, why it grows and how to make it smaller safely.
How to change default browser on MacHow to change default browser on Mac in System Settings or from the browser itself, how to switch back to Safari, and where the default email app is set.
How to find and delete node_modules folders on MacFind every node_modules folder on a Mac with its size, delete the ones you don’t need in Finder, Terminal or npkill, and get them back with npm.
How to clear cache on MacWhat cache is, whether it’s safe to delete, and how to clear app, browser, system and developer caches on a Mac by hand.

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