Restart your Mac
Update macOS
Update all apps
Close unused apps
Quit background processes
Check Activity Monitor
Remove login items
Free up storage space
Empty the Trash
Delete large unused files
Uninstall unused apps
Clear cache files
Reduce desktop clutter
Disable visual effects
Turn off unnecessary extensions
Scan for malware
Check iCloud syncing
Pause large downloads
Reindex Spotlight
Reset SMC
Reset NVRAM or PRAM
Check battery health
Check disk health
Run First Aid in Disk Utility
Upgrade RAM if possible
Switch to an SSD if possible
Reinstall macOS if needed
Contact Apple Support if the issue continues