Your Mac Suddenly Slow?
The Free 10-Minute Tune-Up

Nothing Is Broken. Something Is Full.

A Mac slows down for boring reasons, not dramatic ones. It's rarely a virus, and it's almost never something you did. The usual causes: it hasn't had a real restart in weeks (closing the lid is a nap, not a restart), too many apps launch themselves at startup, the storage drive is nearly full, or one stuck app is hogging the whole machine.

The internet's answer to “my Mac is slow” is a paid cleaner app with a scary scan and a monthly subscription. You don't need one. Apple built every tool you need right into the Mac — free. Ten minutes, four steps, in this order, fixes the large majority of “suddenly slow” Macs I see in Portage County kitchens.

Step 1: Restart Like You Mean It

Most people never restart their Mac — they close the lid and call it “off.” It isn't off; it's napping, with every app and browser tab still sitting in memory, week after week. Click the Apple menu (top-left corner) → Restart…, and in the little window, uncheck “Reopen windows when logging back in” — otherwise everything you're trying to clear comes right back. This alone fixes half of all slow Macs. Going forward, one restart a week — Sunday evening works — is the cheapest maintenance a computer can get.

Step 2: Evict the Apps That Invite Themselves

1. Apple menu → System Settings… → General → Login Items & Extensions.
2. The top section, Open at Login, lists every app that launches itself when the Mac starts.
3. Click an app you don't need at startup, then click the minus sign (−) below the list. The app is NOT deleted — it just stops starting automatically. The plus (+) puts it back any time.
4. Keep cloud storage you actually use (Dropbox, Google Drive) and backup software — those need to run. Remove music and shopping “helpers,” printer “agents,” anything named …Updater, and any “cleaner” or “optimizer” you don't remember choosing.
5. Below that, Allow in the Background gets the same judgment: cloud and backup tools have a reason to be there; a game does not.

Step 3: Give the Drive Room to Breathe

Your Mac's drive isn't just a filing cabinet — the system borrows free space as working room, and when the drive gets close to full, everything slows. Check the gauge at System Settings → General → Storage and aim to keep roughly 15–20% of the drive free. The safe space wins, in order: empty the Trash (deleted files keep taking space until you do), sweep the Downloads folder of old installers and attachments, and review your largest files in the Storage settings — one forgotten video can outweigh a thousand letters. Never delete anything from the System or Library folders; macOS manages those itself. And if Photos is the biggest slice, don't delete memories — make sure a real backup exists first (my Photo Backup guide covers it), then consider Store in iCloud.

Step 4: Let the Updates Through

Go to System Settings → General → Software Update. If an update is waiting, plug in the power cord, click install, and walk away — don't close the lid mid-update. Turn on automatic updates while you're there, and update your apps too (App Store → Updates). One honest caveat: the first day or two after a big macOS update, the Mac may run a little slower while it reorganizes behind the scenes. That's normal and temporary — judge the results after a day, not an hour. Apple never charges for macOS updates and never calls or pops up demanding you install one “immediately.”

Skip the “Mac Cleaner” Apps — Every One of Them

• The “free scan” is a sales funnel. It always finds an alarming number of “issues” — mostly harmless cache files the Mac manages itself — and the Fix button costs money, usually as a subscription that renews forever.
• The core tricks are the tune-up above: trimming login items, clearing space, finding big files. System Settings and Finder do all of it, free, forever.
• Some cleaners ARE the slowdown — an always-running scanner is one more background app on the pile. I've removed cleaner apps from slow Macs and watched the speed come back.
• A web page saying “Your Mac is infected with 5 viruses!” is lying — a website cannot scan your Mac. And real macOS warnings never include a phone number to call.
• Already paying for one? You can cancel and remove it, and I'll gladly do that with you on a visit. Nobody should pay rent on a problem ten free minutes solves.

Still Slow? When It's the Mac, Not You

Sometimes you do everything right and the machine itself is the limit. If it's an Intel-era Mac (roughly 2020 or earlier), the road is visibly ending — macOS Tahoe 26 is the last major macOS version that supports Intel Macs. A tuned-up old Mac used for email, browsing, and photos may still serve fine for another year or two, and “supported and a bit slow” can be a perfectly sound choice. When it is time, the base MacBook Air is the right answer for almost every household I serve — my MacBook Air guide covers choosing one. I don't sell computers, so my only stake is giving it to you straight: run the tune-up first, and the Mac will tell you which conversation to have.

What's in the 27-page PDF

• Why Macs slow down — the boring, fixable causes behind the spinning wheel
• The whole fix in 60 seconds, then the four-step tune-up with a time-and-page map
• The real restart — why sleep doesn't count, and the “reopen windows” box to uncheck
• Login Items & Extensions: where the list lives, plus my keep-or-remove table
• The storage gauge, the 15–20%-free rule of thumb, and the safe ways to reclaim space
• Software Update done right — and why a Mac runs slower for a day after a big update
• Activity Monitor for beginners: the CPU tab, Memory Pressure's traffic light, and Force Quit
• The 40-open-tabs problem — the quick browser tune-up for Safari and Chrome
• A symptom finder table: match what you notice to the page with the fix
• Why I tell every customer to skip MacKeeper-style cleaner apps
• “Your Mac is infected!” scams — the scripts to recognize and the rules that beat them
• The honest aging-Mac talk, keep-it-fast habits, a refrigerator checklist, Q&A, glossary, and a fill-in cheat sheet

Why I wrote this

When I tune up a slow Mac on a first visit, the fix is almost always the free routine in this guide — a real restart, a trimmed login list, some breathing room on the drive. I'd rather you have that routine in writing than pay a cleaner app rent for it. I write these guides as printable handouts so the checklist can live next to the computer, and if you'd rather do it with company, that's a flat $99 visit with a 30-day follow-up included. — Bill