How to Speed Up a Slow Mac (Free Fixes First)

Start simple: restart and update

Before anything drastic, try the basics that fix a surprising amount. Restart your Mac, if you're someone who just closes the lid for weeks, a fresh reboot clears memory and stops runaway processes that quietly accumulate. Then check for macOS updates (System Settings, then General, then Software Update), since updates often include performance and stability fixes. Keeping apps updated helps too. These take minutes and cost nothing, and they resolve a lot of 'my Mac got slow' complaints before you need to dig deeper into settings.

Trim your login items

A common cause of a slow, sluggish Mac is too many apps launching automatically at startup and running in the background. Go to System Settings, then General, then Login Items, and review what starts with your Mac. Remove anything you don't need launching automatically, especially heavy apps and background helpers you rarely use. This also lists background items apps have installed; disable ones you don't recognize or need. Fewer things starting up means a faster login and more resources free for what you actually use.

Use Activity Monitor to find hogs

macOS includes a powerful diagnostic tool: Activity Monitor (find it via Spotlight or in Applications, then Utilities). It shows exactly what's using your CPU, memory, and energy in real time. Click the CPU and Memory columns to sort by heaviest usage and identify the culprits, often one misbehaving app or browser tab consuming far more than its share. Once you spot an offender, you can quit it, or reconsider whether you need it. This turns vague slowness into a specific, fixable problem instead of guesswork.

Free up storage space

A nearly-full drive slows a Mac down, macOS needs free space to work smoothly. Go to System Settings, then General, then Storage, to see what's using space and get recommendations. Empty the Trash, remove large files and old downloads, delete apps you don't use (drag to Trash or use Launchpad), and offload big photo and video libraries to iCloud or an external drive. macOS also offers tools to store files in iCloud and automatically clear clutter. Keeping a comfortable amount of free space is one of the more effective speed fixes.

Tame the browser and background sync

Often the real slowdown isn't macOS, it's your browser. Dozens of open tabs and heavy extensions consume large amounts of memory. Close tabs you're not using, remove extensions you don't need, and consider whether a lighter browsing habit helps. Also check apps that sync in the background (cloud storage, photo libraries) mid-sync, which can temporarily slow things, they usually settle once caught up. Managing browser bloat and background activity frequently recovers noticeable speed without touching anything else on your system.

When hardware is the real limit

If your Mac is still slow after the free fixes, the bottleneck may be hardware, especially on older machines. Running out of RAM (memory) causes slowdowns when you have many apps or tabs open; on older Macs where RAM is upgradeable, adding more helps, though many modern Macs have it soldered and fixed at purchase. An old mechanical hard drive is a huge bottleneck; upgrading to an SSD (on models that allow it) transforms performance. But try every free step first, most 'slow Mac' problems are software clutter, not failing hardware.

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See also: SSD vs HDD: which storage should you buy?, How to speed up a slow Windows PC.

Sources

• If your Mac runs slowly - Apple Support

Published date reflects the original event date (2026-06-13). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.