Today, I have an issues with partition on my Macbook Pro Retina. I got an error message while trying to uninstall Windows 7 through Boot Camp Assistance, and then I got an error message “no bootable device insert boot disk and press any key” when I reboot. Today, I want to share how to fix this issues. If there is someone who’s struggling with this problem, hopefully, fix the issues with this guide.
Step 01. You will get this error message when you turn on or reboot your Macbook. Press and hold the Power button to shut down.
Step 02. Press the Power button to turn on and Press + hold Option key right away until the booting screen appears on the screen.
Step 03. Now you need to re-install Windows 7 operating system to get the partitions right. (Click this link to see how)