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. 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. If you DO have a firmware password set then you will be prompted to enter the password before moving on. I just installed BootCamp on my 2013 Mac Pro and the option key doesn't seem to work when booting up. The screen stays black. Have just bought a new aluminium wired keyboard for my 17" iMac Core 2, running Leopard. key board works fine on iMac. Holding down the Option key during startup will show you a boot screen with all bootable devices listed. This is a real sweet keyboard and I love it. Seems the Option key does not work during the boot process. erased hard drive and installed Sierra. Mac recovery mode not working. Mac Pro mid 2012 quad core intel xeon. I am still having this same issue. Option key not working at boot up. Next select Controller or iBridge in the sidebar. Wait for the chimes and let go. It works when I use my old wired Apple keyboard. I just installed Windows with boot camp. MacOS boot volume not in windows partition. reset Pram. If done correctly, and assuming a firmware password is not set, you should see your internal hard drive show up on the display. reset SMC. Wait 10 seconds. How to manage OS X boot options with wireless keyboards. 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. 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. You can also change what your Mac does by holding down the following keys or key combinations during startup. Another thing worth keeping in mind is ensuring that the keyboard is not faulty. seems like it does not see key board soon enough. Option key not working for switching in bootcamp. Ensure That The Keyboard is Not Faulty. reboot and tap caps lock, cap light did not come on until late in boot up. If you have a Bluetooth keyboard, OS X may ignore keystrokes at startup for booting into Safe mode and other optional boot environments. You can use the mouse or the keyboard to select a device to boot into. Same problem I have the same problem. Power on your Mac while holding the option key on your keyboard. I'm using a Logitech MX Keys w/ wireless USB receiver. was running Mojave. Now, press and hold the Option key and select System Information. One problem though, I cannot boot into windows. The Mac portion recognizes the windows portion perfectly fine, but not vice versa. Shut down your Mac and hold down Command-Option-P-R during boot. 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