Mac Slow to Start Up?
Trim the Login Items

Your Mac Is Starting a Dozen Things You Never Chose

Every Mac keeps a list of items to open automatically the moment you log in — apps, documents, folders, even network drives. Apple calls them login items. Nobody sat down and wrote that list on purpose. It grew one app at a time: an installer that checked a box for you, a tidy little “Launch at startup?” prompt you answered years ago, a helper program that came along for the ride with something bigger.

None of them start instantly. Each wants a slice of memory, a moment of the processor, and a turn at the disk — all at once, all while you're trying to check your email. Ten polite apps together make one impolite startup. The good news is that trimming the list is the safest cleanup on the whole Mac: nothing gets uninstalled, no file is touched, and every change can be undone with one click.

Where the List Lives in macOS Tahoe 26

1. Click the Apple menu — the apple in the very top-left corner of the screen.
2. Click System Settings…
3. In the list down the left side, click General. You may need to scroll to see it.
4. On the right, click Login Items & Extensions. You may need to scroll down here too.
5. The top section, Open at Login, is the list. An Item column shows names; a Kind column tells you whether each one is an app, a document, a folder, or a drive.

Trimming It — Two Clicks, Fully Reversible

Click an item's name in the Open at Login list so it's highlighted, then click the minus sign (−) below the list. That's the whole job. The app is not deleted — it stays in your Applications folder and your Dock, and it works exactly as before. It simply waits for you to open it. Changed your mind? Click the plus sign (+), pick the app, click Add, and it's back on the list. You don't have to do them all at once, either — trimming two or three obvious ones, living with it for a week, then trimming a few more is a perfectly good pace.

What to Keep and What to Trim

• Keep: cloud storage you actually use (Dropbox, Google Drive, OneDrive) — it has to run to keep files in step.
• Keep: backup software. A backup that waits to be asked isn't a backup.
• Keep: a password manager, if you use it daily. It's meant to be waiting for you.
• Trim: anything named …Updater, …Helper, …Agent or …Assistant. Apps check for updates fine when you open them.
• Trim: printer and scanner “utilities” and ink monitors — printing works without them.
• Trim: music, TV, game and shopping apps, and video-call apps you use only occasionally. Meeting links open the app themselves.
• Trim, then investigate: any “cleaner,” “optimizer” or antivirus you don't remember choosing.
• Leave alone: a name you genuinely can't place. Write it down and ask someone. Unknown is not the same as bad.

The Second List: Apps Allowed to Run in the Background

Scroll below Open at Login and you'll find a longer list — app names with switches beside them. These aren't apps that open at login; they're apps permitted to do chores while they look closed, like checking for updates or syncing data. A note on the name so you're not thrown: Apple's macOS Tahoe 26 documentation labels this section App Background Activity, while recent macOS versions have shown it on screen as Allow in the Background. Same section, same switches. Safe to switch off: updaters and helpers for apps you rarely open, games, media and shopping apps, printer utilities. Leave on: cloud storage, backup software, password managers, and anything from Apple — switching those off can stop your syncing or your backups silently, which is the one real risk on this screen.

Yellow Triangles and Other Puzzles

• A yellow triangle beside an item means it won't open because it was moved or deleted — the list is pointing at something that isn't there. Harmless, and the easiest thing on the screen to remove.
• A greyed-out switch is being managed by a work or school profile, or occasionally by security software. Not a fault, and not worth fighting.
• The same company listed three times is normal. One app can install several background pieces — updates, syncing, notifications.
• A drive or folder in the list (the Kind column says “volume” or “folder”) is usually a network share set to reconnect at login. If that drive is long gone, the Mac still waits for it — trim it.
• Take a screenshot first: hold Shift + Command + 3 and you'll have a record of exactly how the list looked before you touched it.

Self-Starters That Hide Somewhere Else

• The Dock: right-click (or Control-click) an app's icon, hover Options, and untick Open at Login if it's checked.
• Inside the app: many apps keep their own “start when I log in” switch under Settings… or Preferences…, usually in a General or Startup section. Video-call and music apps are the usual suspects.
• Yesterday's windows reopening isn't a login item at all. When you choose Restart or Shut Down, untick Reopen windows when logging back in.
• Extensions — the section below the two lists — are add-ons like Markup and Quick Look. They wait to be used and are not why your Mac starts slowly. Leave them alone; switching them off usually just removes an ability you liked.

Testing, Measuring, and Knowing When It's Something Else

Before you change anything, try Apple's own test: restart, and at the login window hold the Shift key while you click Log In, releasing it when the Dock appears. That skips the login items for one session and changes no settings. If that login felt noticeably quicker, the list is your culprit. To measure the fix, count the seconds from login until the Dock stops bouncing, do the trim, restart, and count again — two numbers on paper beat any “speed score” an app wants to sell you. And be honest about what this fixes: login items explain slow at startup. If the Mac drags all day, or the drive is nearly full, or one app beach-balls constantly, that's a different guide — my Mac Tune-Up, Startup Disk Almost Full, and Spinning Beach Ball guides each take one of those.

Skip the Startup-Manager Apps

Everything above is built into macOS and free forever. The apps that offer to “manage your startup items” do the same two clicks with more drama, usually for a subscription — and several of them install themselves as one more program running at startup, which is the very thing you're trying to fix. Junk software of that family almost always adds itself as a login item or a background item, because it needs to be running to nag you. Two calm rules cover it: a website cannot scan your Mac, so any page announcing “5 viruses found” is lying; and real macOS messages never include a phone number to call.

What's in the 27-page PDF

• Why the login list grows — the four ways apps put themselves on it without asking
• The whole fix in six checkboxes, plus a symptom table that sends you to the right guide
• The exact path in macOS Tahoe 26, click by click, and what the Item and Kind columns mean
• Trimming safely with the minus (−) and undoing it with the plus (+) — nothing is ever deleted
• My full keep-or-trim table: cloud storage, backups, updaters, printer agents, cleaner apps
• The background list — what's safe to switch off, and the one setting that can silently stop your backups
• Strange background names translated: …Helper, …Agent, …Updater, and reversed web addresses
• Yellow triangles, greyed-out switches, and drives that make the Mac wait at startup
• The self-starters hiding in the Dock, inside apps, and behind the “reopen windows” checkbox
• The Shift-key login test and safe mode — Apple's own way to prove what's slowing you down
• Junk software that installs itself at startup, and how to remove an app for good
• A refrigerator checklist, kitchen-table Q&A, a plain-English glossary, and a fill-in cheat sheet

Why I wrote this

When I tune up a slow Mac on a first visit, this list is where the traffic jam lives more often than not — a pile of helpers nobody chose, all elbowing for the door at the same moment. It costs nothing to trim and risks nothing at all, which is exactly why I'd rather you have it 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. If you'd rather do it with company, that's a flat $99 visit with a 30-day follow-up included. — Bill