I just installed Windows with boot camp. seems like it does not see key board soon enough. reset Pram. You can also change what your Mac does by holding down the following keys or key combinations during startup. If done correctly, and assuming a firmware password is not set, you should see your internal hard drive show up on the display. I just installed BootCamp on my 2013 Mac Pro and the option key doesn't seem to work when booting up. If you have a Bluetooth keyboard, OS X may ignore keystrokes at startup for booting into Safe mode and other optional boot environments. This is a real sweet keyboard and I love it. The problem arises when I load into windows 10 and it can't boot back into the Mac portion because windows can't load the Mac OS boot volume. The screen stays black. Seems the Option key does not work during the boot process. Wait 10 seconds. How to manage OS X boot options with wireless keyboards. I can get into either Windows or the Mac OS going through system preferences, but when I press the option key at start up, all it shows is the Mac OS. reset SMC. Now, press and hold the Option key and select System Information. Next select Controller or iBridge in the sidebar. reboot and tap caps lock, cap light did not come on until late in boot up. One problem though, I cannot boot into windows. key board works fine on iMac. Option key not working at boot up. Now, I can't even restart to change boot camp. Now, you should see the Apple T2 chip on the right if your Mac supports it. Wait for the chimes and let go. Holding down the Option key during startup will show you a boot screen with all bootable devices listed. erased hard drive and installed Sierra. Mac Pro mid 2012 quad core intel xeon. Shut down your Mac and hold down Command-Option-P-R during boot. I have a Razer Deathstalker as my regular keyboard, but OSX stopped recognizing the option key at startup, so I had to plug in the default mac keyboard as well for just the option key. I'm using a Logitech MX Keys w/ wireless USB receiver. ... (On some Mac keyboards the Option key will be named Alt). Mac recovery mode not working. It works when I use my old wired Apple keyboard. When your Mac powers up, it normally uses the system on its internal hard drive unless you change this behavior by choosing System Preferences@@→Startup Disk. Power on your Mac while holding the option key on your keyboard. The Mac portion recognizes the windows portion perfectly fine, but not vice versa. If you DO have a firmware password set then you will be prompted to enter the password before moving on. Ensure That The Keyboard is Not Faulty. MacOS boot volume not in windows partition. Option key not working for switching in bootcamp. Same problem I have the same problem. 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