Question: Every time I boot into OSX or Windows, Steam automatically starts.

Is there a way to stop Steam starting whenever I boot up my computer?

Answer: 
An alternative solution on Windows (starting from 8) is to open task manager and disable Steam Client Bootstrapper from the Start-up tab.

![Task Manager, Start-up, Steam Client Bootstrapper, Dropdown menu, Disable](https://i.stack.imgur.com/89m5b.png)

**Note:** This is an override switch to Steam's setting. You cannot re-enable it from Steam settings after disabling it here.
For Mac users:

1. Go to the  Apple menu and choose “System Preferences”, then go to “Users & Groups”
2. Select the user that is active in OS X, then choose the “Login Items” tab
3. Select “Steam” from this list and then hit the Delete key on the keyboard to remove steam from the automatic launch on login list
4. Close out of System Preferences