How to start up in macOS from Windows

1. Go From Windows To Mac Bootcamp
2. Run Mac On Windows

If you're in Mac OS X, you can switch to the Windows partition using the Startup Disk utility within System Preferences. In the Startup Disk, choose the 'Windows on BOOTCAMP' partition, and click 'Restart.' Then, confirm your choice to reboot to Windows and give the computer about a minute to make the switch. I successfully installed boot camp and Vista on my imac so I could watch netflix on my computer (other than that I have no use or patience for Vista or Windows). Now, I am in Windows Vista and am unable to switch back to Mac OS X.

Go From Windows To Mac Bootcamp

1. From the notification area on the right side of the Windows taskbar, click to show hidden icons.
2. Click the Boot Camp icon .
   
3. From the menu shown, choose Restart in macOS.
   If you haven't installed the latest Boot Camp updates, you might get the message 'Could not locate the OS X boot volume'.
   

Run Mac On Windows

Or use Startup Manager as your Mac starts up:

1. Restart your Mac from the Start menu in Windows.
2. Press and hold the Option (or Alt) ⌥ key as your Mac begins to restart.
3. Select your Mac startup volume (Macintosh HD) in the Startup Manager window, then press Return or click the up arrow:
   

How to start up in Windows from macOS

• Use Startup Manager to choose your Windows (Boot Camp) volume during startup.
• Or select your Boot Camp volume in Startup Disk preferences, then restart.

Learn more

• If you're having difficulty using VoiceOver or another screen reader to complete these steps, please contact Apple Support.
• Learn how to install Windows 10 on your Mac.