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Search for 'clean my Mac' and you will find dozens of apps promising to speed it up, remove viruses and boost memory. Some of those promises are real. Many are not. Here is how we think about it. We make a Mac cleaner ourselves, so we will also tell you where that bias might show.
What a cleaner can really do
- Show what is using your disk, by type, faster than clicking through Finder.
- Find files that macOS and apps can make again, such as caches, logs and old installers.
- Find the leftovers of apps you deleted.
- Find duplicates and large files you forgot about.
- List the apps you could close and the apps that start with your Mac.
What a cleaner cannot do
Freeing disk space can make a nearly full Mac feel faster, because macOS needs room to work. Beyond that, be careful. No app can make your processor faster. 'Memory boosters' mostly repeat what macOS already does for itself. And a scary scan that finds 'hundreds of threats' in seconds is a common sales tactic, not a sign of danger. Your Mac already has built-in protections against malware.
When a cleaner is worth it
- You have a small disk, such as 256 or 512 GB, and it is always nearly full.
- You are a developer and build files, caches and old simulators keep eating space.
- You have not cleaned the Mac in years and do not know where to start.
- Your time is worth more than the price of the app.
When you can skip it
If you have plenty of free space and you are comfortable in Storage settings, you do not need one. Our free guides cover the same ground by hand: how to free up space on a Mac, how to clear cache safely and the 20-minute clean-up.
How to judge a cleaner before you install it
- It shows every item, and why it is safe or risky, before anything moves.
- It asks before every clean-up and lets you move things to the Bin so you can undo it.
- It never runs on its own in the background.
- It is signed and notarized by Apple, so macOS can check it has not been tampered with.
- The price is plain: one payment, or a subscription you can cancel, with a refund policy.
- It tells you what data it collects. Ideally the answer is none.
- It does not try to frighten you into buying with big red numbers.
Where Speed Up My Mac fits
Speed Up My Mac is built around those rules. It shows what fills your disk, finds junk and leftovers with a risk level for each item, lets you close apps you are not using, and lists startup apps. Every clean-up asks first, and you choose the Bin or permanent delete. It is signed and notarized, does not use the network, and is a one-time purchase with a 30-day money-back guarantee. It does not remove malware and it does not boost your processor, and we do not claim it does. It needs macOS 15 or later.
Our advice
Try the free methods first. If you find you keep coming back to the same chore, an app you trust can save you the time. Whichever you choose, pick one that shows its work.