The only way I've been able to control which OS starts up is to restart from the Boot Camp control panel in OS X in either OS. I've tried pressing the keys from before the startup chime and just after. I've tried hold down each of the two option keys and I've tried holding down both at once. This is true whether I'm starting from the shut-down condition, or restarting. I'm finding that holding down the option key has no effect - the machine boots into whichever OS was last running. This displays icons for all available startup disks and lets you override the default setting for the startup disk that is in Startup Disk preferences (OS X) or the Boot Camp control panel (Windows), without changing that setting.ġ Restart your Mac and hold down the Option key until disk icons appear onscreen.Ģ Select the startup disk with the operating system you want to use, then click the arrow beneath the icon. You can select which operating system to use during startup by holding down the Option key. Select an operating system during startup Wait five seconds, then press the 'Power' button.I have Windows 7 installed on a 15-inch Retina MacBook Pro.Īccording to Apple's Boot Camp Installation and Setup Guide, pg. Wait fifteen seconds, then plug it back in.

This is one case where I think Apple carried its simplistic design a little bit too far. Desktop - Shut down the iMac and unplug the power cord. All it takes to force a restart of a frozen MacBook Pro with Touch Bar is to press down on the Touch ID button until the device reboots.Release the 'Power' button, reinsert the battery, and plug in your computer to a power source. You can release the Shift key when the login window appears on the screen. Apple makes it easy to restart your Mac Pro using a menu located at the top of your screen. Unplug the power adapter and remove the battery, then hold down the 'Power' button for five seconds. Restart your Mac and quickly hold the Shift key while your device is booting up.

Laptop with removable battery - Shut down your computer.

Using the left side of the built-in keyboard, hold down ⇧ Shift + Control + ⌥ Option while pressing the 'Power' button, then release all keys, and finally press the 'Power' button again.

Laptop with non-removable battery - Shut down your computer and plug it into a power source.

If none of the steps above solved your problem, reset the SMC: X Research source An issue with the SMC can prevent your power button from working properly, or cause general slowdowns. The SMC, or System Management Controller, handles many of the physical components on your Mac.

Restart macbook pro with keyboard