| Issue | Recommended Fix |
|---|---|
| Slow Boot Times | Disable unnecessary Login Items in System Settings. |
| Login Screen Lag | Boot into Safe Mode to clear system caches. |
| High CPU on Startup | Re-index Spotlight using Terminal. |
| Background Process Lag | Check Activity Monitor for “mds” or “cloudphotod” tasks. |
What is the macOS Sequoia slow startup issue?
The macOS Sequoia slow startup issue refers to an unexpected delay during the boot sequence or immediately after the login screen. Users upgrading to macOS 15 often report seeing a prolonged Apple logo progress bar or a “spinning beachball” during the initial desktop load.
This performance bottleneck is typically caused by outdated startup daemons, incompatible login items, or intensive background indexing. Since Sequoia introduces new system-level features, the OS often spends significant resources re-cataloging files and syncing iCloud data during the first few boot cycles.
Step-by-Step Solutions
1. Manage Login Items and Background Tasks
Many applications automatically set themselves to launch at startup, consuming vital RAM and CPU cycles. macOS Sequoia is particularly sensitive to legacy background tasks from older app versions.
Navigate to System Settings > General > Login Items & Extensions. Under the “Open at Login” section, select unnecessary apps and click the minus (-) button. Additionally, toggle off non-essential apps under “Allow in the Background.”
2. Clear System and Kernel Caches
A “stuck” cache can cause the system to hang during the boot process. Booting into Safe Mode is the most effective way to flush these temporary files without third-party software.
For Apple Silicon Macs, shut down your Mac, then press and hold the Power button until “Loading startup options” appears. Select your volume, hold the Shift key, and click “Continue in Safe Mode.” Restart normally after the desktop loads.
3. Re-index Spotlight Search
If your Mac is slow specifically after reaching the desktop, the Spotlight index (mds) might be corrupted. You can force a total re-index using the Terminal to ensure the system isn’t caught in a loop.
sudo mdutil -E /After entering your password, macOS will erase the old index and start building a new one. Note that performance may be slightly impacted for 30 minutes while the re-indexing occurs.
4. Remove Obsolete Launch Agents
Hidden configuration files in your Library folders can trigger slow startups if they point to apps that are no longer compatible with macOS Sequoia.
Open Finder, press Cmd+Shift+G, and navigate to /Library/LaunchAgents and ~/Library/LaunchAgents. Move any .plist files related to uninstalled or old software to the Trash and restart your machine.
5. Reset NVRAM (Intel Macs Only)
If you are running macOS Sequoia on a supported Intel-based Mac, a corrupted NVRAM can cause boot delays. This stores startup disk selection and recent kernel panic information.
Restart your Mac and immediately hold Option + Command + P + R for about 20 seconds. This process resets the settings and can often clear hardware-related boot lags.