Slow startup on Mac usually comes down to too many apps launching automatically at login, not the machine itself getting slower. Here's how to find and fix the actual cause.
1. Review your login items
Go to System Settings > General > Login Items. Everything listed under "Open at Login" launches automatically every time you start your Mac — and it's common for this list to quietly grow over years of installing apps that add themselves without asking. Remove anything you don't need running immediately on startup.
2. Check background items too
Below Login Items, the same screen shows "Allow in the Background" — apps and services that can run background processes even when not actively open. Disable anything unfamiliar or unnecessary here as well.
Tip: cloud sync services (iCloud, Dropbox, OneDrive, Google Drive) are common, legitimate causes of slow startup since they all try to sync immediately on boot. You don't need to remove them, but having several running at once compounds startup time.
3. Check available disk space
macOS needs free space for system caches and virtual memory, and startup gets noticeably slower when a drive is nearly full. Check via Apple menu > About This Mac > Storage — aim to keep at least 15-20GB free.
4. Check Activity Monitor right after boot
Open Activity Monitor immediately after logging in and sort by CPU. If something is consistently consuming high resources in the first minute or two after startup, that's likely your actual bottleneck — worth investigating what it is specifically.
5. Reset NVRAM (Intel Macs)
On Intel-based Macs, restart and hold Option + Cmd + P + R until you hear the startup sound twice. This resets certain low-level settings that can occasionally affect boot behavior. Apple Silicon Macs handle this automatically and don't need a manual reset.
6. Check for a failing or full startup disk
Run Disk Utility > First Aid on your startup disk. If it reports errors, that's a more serious underlying cause of slowness, not just clutter — worth addressing directly rather than continuing to troubleshoot around it.
7. Consider a clean restart test
Boot into Safe Mode (hold Shift while powering on) and time how long it takes compared to normal startup. Safe Mode disables most login items and non-essential processes automatically — if it's significantly faster, that confirms login items and background apps are the real cause.
The bottom line
Startup time creeping up over months is almost always accumulated login items, not your Mac aging. Trimming that list is the highest-impact fix before considering anything more drastic.