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.'">
From the notification area on the right side of the Windows taskbar, click to show hidden icons.
Click the Boot Camp icon .
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.'
Press Apple icon and choose Disk to boot from (don't remember the name): It shows me the two partitions: Mac and Windows. It asks for a password to decrypt the Mac option, when I choose it. After entering the password it vanishes and only the Windows option is left. Trying to reinstall OSx: Since macOS Sierra is. Feb 24, 2020 Mac Won’t Turn On/Boot after Updating to MacOS Catalina, High Sierra, Mojave: Free Troubleshooting Guide. Mac not begins after sleep or after a Power outage. Lost of users also reporting mac won’t start on fan running or after restart/ after three beeps/ water spill/ after shutdown or on the loading bar.
Restart your Mac from the Start menu in Windows.
Press and hold the Option (or Alt) ⌥ key as your Mac begins to restart.
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
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Use Startup Manager to choose your Windows (Boot Camp) volume during startup.
Or select your Boot Camp volume in Startup Disk preferences, then restart.
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If you're having difficulty using VoiceOver or another screen reader to complete these steps, please contact Apple Support.