How to Speed Up Your Mac: The Complete Guide

A slow Mac is rarely one big problem — it's a dozen small ones: heavy animations, apps that reopen on login, a full startup disk, and background features you never use. This guide walks through the changes that actually make a difference, in the order worth doing them, with a link to a step-by-step for each.

1. Cut the visual overhead

macOS spends real GPU and CPU time on animation and translucency. On any Mac more than a couple of years old, turning these down is the single most noticeable speed-up. Start by disabling window and Dock animations, then reduce transparency and speed up Mission Control. None of these change what your Mac can do — only how much time it spends drawing it.

2. Fix what happens at login

A Mac that's slow for the first few minutes after you turn it on is usually loading too much at startup. Audit your login items, then stop apps from reopening the windows they had open last time — this alone can shave login time dramatically.

3. Free up the startup disk

macOS slows down when the boot drive is nearly full — it has no room for swap and caching. See what's using your space, free some up, and clear caches safely. If you're chasing gigabytes, find your largest files and delete duplicates.

4. Remove apps you don't use

Every installed app can add background helpers, login items, and menu-bar processes. Fully uninstall the ones you don't use (dragging to Trash leaves leftover files behind), and turn off Power Nap if your Mac wakes to do background work you don't need.

5. What not to do

You don't need a “cleaner” app that scans for junk and pushes a subscription — most of what they do is either cosmetic or already handled by macOS. The changes above are all built into the system; you just have to find them.

Every setting here is a one-click, reversible toggle in Mainspring — no Terminal, no guesswork, and an undo button for all of it.