Open System Preferences Choose “ Users and Groups ” panel; in the left column, under “ Current User ”, click on your User name. Click on “ Login Items ” tab. Delete every entry that can launch an application by selecting the item and then clicking the “minus sign” (–) under the list.

Use the setting in the log out or restart dialog

When you log out of your Mac or restart it, deselect ”Reopen windows when logging back in” when prompted.

Or start up in safe mode, then restart normally. This doesn't change the setting, but your Mac forgets any windows that were open the last time you logged out or restarted.

If you deselect this setting and an app continues to open automatically:

• The app might be a login item. You can add or remove login items in Users & Groups preferences.
• The app might have installed its own startup software. Often this is controlled by a setting within the app. Check the app's preferences or documentation, or contact the app's developer.

Use the setting in General preferences

Disable Unwanted Startup Programs

To prevent apps from remembering the windows they had open, choose Apple menu  > System Preferences, click General, then select ”Close windows when quitting an app.”

How To Disable Apps On Startup Mac

Or press and hold the Shift key while opening an app. This doesn't change the setting, but the app forgets any windows that were open the last time you quit the app.

If these steps don't work for an app, the app might have its own setting for reopening windows. Check the app's preferences or documentation, or contact the app's developer.