The best Mac power-user tips (tweaks that actually stick)
macOS ships with sensible defaults — sensible for new users. Once you know your way around, a handful of tweaks make the whole system faster, quieter, and more yours. These are the ones that reliably improve daily life, with no risk of breaking anything.
Every tweak here is reversible. Most are a Terminal command or two away, and many are a single toggle in Mainspring. Nothing here touches system files, requires disabling SIP, or risks bricking anything. Tweak confidently.
Show hidden files
macOS hides dot-files (like .zshrc and .gitconfig) and certain system folders from Finder by default. For developers and power users, this gets in the way quickly.
The fastest fix: in any Finder window, press ⌘ Shift . (Command-Shift-Period). Hidden files appear immediately, grey-tinted to distinguish them. Press the same combo again to hide them.
To make it permanent — so hidden files always show without the keyboard toggle:
# show hidden files permanently in Finder
defaults write com.apple.finder AppleShowAllFiles -bool true
killall FinderFull guide: Show hidden files in Finder.
Speed up (or remove) the Dock animation
The Dock's auto-hide delay is 0.5 seconds by default — long enough to be noticeable when you're moving fast. And the bounce animation on opening apps adds visual noise that serves no purpose once you know the app is launching.
To kill the auto-hide delay entirely:
# remove the Dock auto-hide delay
defaults write com.apple.dock autohide-delay -float 0
killall DockThe Dock snaps open the instant your cursor reaches the bottom of the screen. To restore the default delay: defaults delete com.apple.dock autohide-delay && killall Dock.
Full guide: Speed up the Dock on a Mac.
Turn off autocorrect
macOS autocorrect works across the system — Notes, Messages, Mail, any text field. It quietly changes words mid-sentence, which is useful if you type fast and sloppy, and maddening if you don't. Most power users and developers turn it off immediately.
Go to System Settings → Keyboard → Text Input → Edit… and untick Correct spelling automatically. You can also untick Capitalize words automatically and Use smart quotes and dashes while you're there.
Full guide: Turn off autocorrect on a Mac.
Set up hot corners
Hot corners let you trigger actions by moving your cursor to any corner of the screen. Once configured, they become faster than any keyboard shortcut for things you do dozens of times a day: locking the screen, showing the desktop, or launching Mission Control.
Go to System Settings → Desktop & Dock → Hot Corners (scroll to the bottom). Click any corner's dropdown and assign an action. Good defaults: bottom-left to lock screen, bottom-right to show desktop.
Full guide: Set up hot corners on a Mac.
Keep your Mac awake with the lid closed
When you close a MacBook lid, it sleeps — even if it's connected to an external monitor, running a build, or downloading a large file. If you use your Mac at a desk in clamshell mode, or need it to keep working with the lid shut, one pmset command handles it:
# prevent sleep when lid is closed (while on AC power)
sudo pmset -c disablesleep 1To reverse: sudo pmset -c disablesleep 0. Use caffeinate for a temporary version that lifts when you close Terminal.
Full guide: Keep your Mac awake with the lid closed.
Always show file extensions
Finder hides file extensions by default — you see "Report" instead of "Report.docx," and "photo" instead of "photo.heic." This makes it genuinely harder to know what you're working with, especially when you have multiple files with the same base name in different formats.
Go to Finder → Settings → Advanced and tick Show all filename extensions. Every file in every Finder window now shows its extension. You can also enable it per-file via Get Info (⌘ I), but the global toggle is the one worth setting.
Full guide: Always show file extensions in Finder.
Always show scrollbars
macOS hides scrollbars until you actually scroll, which makes it non-obvious whether a view has scrollable content at all. Turning them on permanently restores the visual affordance that's been standard in every desktop OS for decades.
Go to System Settings → Appearance → Show scroll bars and choose Always. Scrollbars now appear in every scrollable view, at rest, as thin tracks. Trivial to reverse by switching back to Automatically based on mouse or trackpad.
Full guide: Always show scrollbars on a Mac.
Switch to Dark Mode
Dark Mode flips macOS to dark backgrounds across menus, windows, sidebars, and most built-in apps. It's one of the most popular tweaks — particularly useful in dim environments, and it reduces eye fatigue on bright displays.
Go to System Settings → Appearance and choose Dark. Or choose Auto to let macOS switch automatically at sunset. The change takes effect instantly, no restart needed.
Full guide: Turn on Dark Mode on a Mac.
Silence UI sound effects
The trash thud, the screenshot camera click, the volume feedback beep — macOS makes a surprising amount of noise for an OS that presents itself as premium and quiet. All of it is optional.
Go to System Settings → Sound and untick Play user interface sound effects. That silences the trash and screenshot sounds. Separately, untick Play feedback when volume is changed to silence the volume beep.
Full guide: Silence UI sound effects on a Mac.
Disable Spotlight web and Siri suggestions
Every time you type in Spotlight, macOS sends the query to Apple's servers to fetch web results and Siri suggestions. If you'd rather keep searches local — faster, quieter, and not phoning home — turn those off in System Settings → Siri & Spotlight → Search Results. Untick Siri Suggestions, Web Searches, and Spotlight Suggestions.
You lose the web snippet cards and Siri natural-language answers. You keep app search, file search, calculator, dictionary, and contacts — all the stuff that's actually useful.
Full guide: Disable Spotlight web and Siri suggestions.
Turn on Low Power Mode
Low Power Mode is available on MacBooks running macOS 12 Monterey and later. It throttles CPU and GPU performance slightly in exchange for meaningfully longer battery life and cooler, quieter operation — useful on long flights, in meetings, or any time you're away from an outlet.
Go to System Settings → Battery and find the Low Power Mode dropdown. You can set it to Only on Battery, Always, or Never. On desktop Macs, Low Power Mode reduces fan usage and heat at a modest performance cost.
Full guide: Turn on Low Power Mode on a Mac.
Wake your Mac when you plug in power
By default, plugging in your charger does nothing if your Mac is already asleep. A single pmset command changes that — your Mac wakes the instant it detects AC power:
# wake on AC power connection
sudo pmset -a acwake 1Useful if you work at a desk: walk over, plug in, and your Mac is ready before you sit down. To reverse: sudo pmset -a acwake 0.
Full guide: Wake your Mac when you plug in power.
Mainspring collects the best of these hidden settings — show hidden files, Dark Mode, silence UI sounds, Spotlight web results, wake on power, and many more — into a single, labelled toggle list. No Terminal commands to memorize, no settings panels to hunt through. Every toggle shows you exactly what it does and can be reversed with one click. The full list runs to over 90 tweaks.
$29 once. Free trial included — download it, try every toggle, see what sticks.
Try Mainspring free →Signed & notarized by Apple · 1-day free trial · $29 once
A note on reversibility
Every tweak in this list is reversible. The defaults write commands all have a defaults delete or -bool false counterpart. System Settings changes can be undone in the same pane. Nothing here modifies system files, touches SIP-protected directories, or requires a recovery boot to undo. The worst outcome from any of these is "I don't like it" — fixed in thirty seconds.
That's what makes power-user tweaks worth exploring. The risk is low; the upside — a Mac that works more like you think — is real and lasting.