Mac Apps Won’t Open on macOS Tahoe? 9 Fixes

After the macOS Tahoe update, you click Photos, Passwords, or another app and nothing happens. The icon bounces once in the Dock and quits, or it opens to a spinning beachball, or Passwords and Safari and Mail all crash together. Here is the connection almost every generic fix list misses.

On Tahoe, Passwords, Safari, and Mail all share the same font and text engine. So a single corrupt font, or the unpatched font bug in the very first Tahoe build, can take all three of them down at once. That is why the one fix that surprises people, resetting your fonts, so often brings several apps back to life in one move.

There is also a second, simpler thing going on. Half of the "Passwords won't open" reports are not crashes at all. The app just moved, and people are clicking a dead icon. I read through the real Apple threads, so let me sort out which problem you actually have and fix it.

First: Is the App Broken, or Just Moved?

Two quick truths that save a lot of people:

• Passwords is now its own app. It lives in your Applications folder and in Spotlight, not inside Safari anymore. Press Command + Space, type Passwords, and open it from there.
• Launchpad is gone. If your old apps grid stopped working, that is by design. Use the new Applications app (in the Dock or Applications folder) instead, and drag the dead Launchpad icon off your Dock.

If your app genuinely crashes or refuses to open, start the fixes below.

Step 1: Update macOS First

The very first Tahoe release shipped with a font-parsing bug that crashed exactly these apps. Apple fixed it in 26.0.1, with more stability in later updates, so this alone solves it for a lot of people.

Here's what to do:

• Open the Apple menu, System Settings, General, then Software Update.
• Install the latest macOS 26 release, and check App Store, Updates too.

Step 2: Reset Your Fonts (the One-Shot Fix)

This is the fix that brings Passwords, Safari, and Mail back together, because one bad font was crashing the shared text engine. It restores the default fonts and quarantines the rest.

Here's what to do:

• Open the Font Book app (Command + Space, type Font Book).
• In the menu bar, choose Font Book, Settings, then the Advanced tab.
• Click Reset Fonts, then Proceed, and authenticate.
• Relaunch the apps that were crashing.

Important: This moves your non-system fonts to a "Fonts (Removed)" folder. Once your apps are working, reinstall your custom fonts one at a time so you can catch the bad one before it breaks things again.

Step 3: Rebuild the Photos Library

If it is specifically Photos that will not open, lags for minutes, or shows pixelated images, your photo library is likely corrupt, not the app. Photos has a built-in repair for exactly this.

Here's what to do:

• Fully quit Photos with Command + Q.
• Hold Option + Command and launch Photos, and keep holding both keys until a Repair Library dialog appears. It can take a couple of tries.
• Click Repair and enter your admin password.

It can run from a few minutes to a while on a big or iCloud library, so let it finish. As one helpful user reassured people, "you do NOT need to wipe the Mac. You do NOT need to reinstall programs until Photos is stable."

Important: If your Photos library lives on an external drive, that drive must be formatted as APFS or Mac OS Extended (Journaled). Running a library from a wrong-format drive can corrupt it. Check the format in Disk Utility.

Step 4: Reset the Crashing App's Preferences

A corrupted preference file can stop a single app from launching. Removing it makes the app build a fresh one.

Here's what to do:

• Quit the app. In Finder, press Shift + Command + G and go to `~/Library/Preferences/`.
• Find the file for the app, like `com.apple.Photos.plist` or `com.apple.keychainaccess.plist`, and drag it to your Desktop.
• Relaunch the app. Keep the copy until you confirm it works.

Step 5: Find the Real Error From Terminal

When an app silently bounces and quits, Terminal will tell you why instead of leaving you guessing.

Here's what to do:

• Open Terminal and run `open -a "Photos"` (or `open -a "Passwords"`).
• Read the output for a clue like "Missing framework," "Permission denied," or "Code signature invalid."
• You can also open the Console app and check Crash Reports for the same app.

Step 6: Stop the Spotlight Freezes

If apps open but then beachball and pin your Mac, a stuck Spotlight indexer is often the cause. Two toggles calm it down.

Here's what to do:

• Open System Settings, then Spotlight.
• Turn off Show Related Content and Help Apple Improve Search.

People reported the CPU load dropping almost instantly after this, with the runaway indexing process leaving the CPU list.

Step 7: Re-Grant the App's Permissions

An update can drop an app's permissions, which can stop it working properly. Re-granting Full Disk Access fixes that.

Here's what to do:

• Open System Settings, Privacy & Security, then Full Disk Access.
• Make sure the affected app is turned on. If it already is, toggle it off and on, or remove it and add it back.

Step 8: Boot Into Safe Mode

Safe Mode clears system caches and loads none of your third-party login items, fonts, or extensions, so it tells you fast whether one of those is the culprit.

Here's what to do:

• Shut down. Hold the power button until "Loading startup options" appears, pick your disk, hold Shift, and click Continue in Safe Mode (Intel: restart holding Shift).
• If the app works in Safe Mode, open System Settings, General, Login Items & Extensions, and disable items one at a time to find the offender.

Step 9: The Last Resorts

If you have genuinely worked the list:

• Test a fresh admin account. System Settings, Users & Groups, add a user, and open the app there. If it works, the fault is in your old account's caches, not the OS. Set up the new account by hand rather than migrating, since migrating can carry the problem over.
• Repair the disk. Boot Recovery, open Disk Utility, and run First Aid on your volume.
• Reinstall macOS without erasing. As a final step, back up, then reinstall macOS Tahoe from Recovery. It keeps your files and replaces damaged system components.

Quick Recap

In the order I would actually try them:

1. Confirm Passwords just moved (it is a standalone app now) and Launchpad is replaced by the Applications app.
2. Update to the latest macOS Tahoe, which patches the font crash bug.
3. Reset your fonts in Font Book to fix Passwords, Safari, and Mail together.
4. Rebuild the Photos library with the Option and Command repair.
5. Delete the crashing app's preference file.
6. Launch from Terminal to read the real error.
7. Turn off Show Related Content and Help Apple Improve Search to stop Spotlight freezes.
8. Re-grant Full Disk Access.
9. Test a fresh account, repair the disk, and reinstall macOS if needed.

The big takeaway: Photos and Passwords failing are not two random bugs. Several Tahoe apps share one font engine, so when they crash together, reset your fonts first. And before you panic over Passwords, remember it simply became its own app, so half the time nothing is broken at all.

Where to Next

More macOS Tahoe help: This fix is part of our macOS Tahoe problems and fixes guide, a single place that rounds up every common Tahoe issue. If something else on your Mac is acting up after the update, start there.