If you are unable to startup the installer after connecting the USB drive to your Mac, then first you should try connecting it to a different USB port. Have you tried connecting to a different USB port? So, a few FAQs are mentioned below which may help you when you are facing any difficulties. You may face several issues during MacBook Pro Boot from USB or any external drive. Part 2: Common Problems and Fixes When Boot Mac from External Drive
So, this is how to boot Mac from USB drive. If you have multiple USB drives connected, then the Startup Manager shall list the drives with the bootable OS. This way you can boot your Mac with an external USB drive, but the most critical part is to prepare the USB drive. Now, select the drive you want to use with your mouse.Ħ.ğinally, press "Return" key on the selected option to boot Mac. Startup Manager will begin scanning your device and you will be provided with a list of devices that are connected to your Mac.ĥ. You have to format the USB drive and insert the proper Operating System, which is OS X.Ģ.Ěs soon as the startup music begins you need to press and keep holding the "Option" key.ģ.Ěfter that release that key, the Startup manager will be launched.Ĥ. You need to prepare your USB drive beforehand for this specific purpose. Using your USB drive to boot Mac is not as simple as you think. You can easily burn a bootable image of OS X on a DVD by using Disk Utility. So, it is not too complicated to Mac boot from CD/DVD. This will start the OS X installer from the CD/DVD on your Mac. When the startup music is playing press and hold the “C” key from the keyboard.ģ. Open your Mac or restart the device if you were already using it.Ģ. If you want to boot your MacBook/Air/Pro/iMac from an optical media like CD or DVD you need to follow the steps below:ġ.
Apple is against booting Mac from an external storage device, because you may install an older version of OS X than the one you were using. Second, the CD or DVD you are using to boot must contain Apple’s Super Drive or if you are using a USB drive then it should be formatted with GUID Partition, and you are also required to install OS X installer.First, you have to have an Intel-Based Mac.Part 1: How to Boot Mac from USB Drive/CD/DVDĪctually, it is possible to boot Mac from external drive or a hard drive, but there are a few specific requirements needed for your Mac to become eligible for that process. Apple Cannot Check It for Malicious Software.
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