To prevent Mac from reopening apps after restart, untick the 'Reopen windows when logging back in' box.Avoid forceful shutdowns on your MacBook to maintain control over reopening preferences.On Mac desktops, refrain from turning off the main power switch to prevent automatic reopening of apps.Remove apps set to launch on startup to avoid automatic reopening post restart.Hold the Shift key while opening an app to prevent restoring documents from the previous session.Disable auto-reopening of windows and tabs in Safari and Chrome through respective settings.Ensure all apps are closed before shutting down the Mac to start with a clean slate next time.Boot your Mac in Safe Mode to reset and not reopen apps from previous sessions.If issues persist, update macOS to the latest version for potential bug fixes.