So, let's get started…. 5. If you want to select an external startup disk before restarting your Mac, quit Startup Security Utility, then choose Apple menu  > Startup Disk. This way you can boot your Mac with an external USB drive, but the most critical part is to prepare the USB drive. I will always keep a Mojave boot drive on an external SSD during the lifetime of my ownership of this Mac mini 2018. Close the window. Reply. Below mentioned are some of them, just follow the steps and boot from the external hard drive on Mac. With the Mac powered off, connect the external bootable drive to the Thunderbolt 3 port. January 3, 2021 No comment. This way you can boot your Mac with an external USB drive, but the most critical part is to prepare the USB drive. To do this, open Disk Utility and connect the drive to your Mac. Startup Manager will begin scanning your device and you will be provided with a list of devices that are connected to your Mac. If you have bought an M1-based Mac or MacBook but need to upgrade your storage without buying a brand new device, you can set up your Mac to run from an external drive. To Boot From Your New Mac Clone Boot Drive 1. Dominick says: August 13, 2020 at 3:51 pm I had the exact same problem. This method has users downloading macOS beforehand, then installing it to the external disk as a separate action. Booting from an External Hard Drive on Mac. It is probably the more favorable of the methods due to freeing up the time for the download to when the Internet connection isn't being used, such as at night or outside of business hours. The likeliest of the reason for choosing the boot from the USB method is that your Mac won't start which denies the user access to the computer. You may face several issues during MacBook Pro Boot from USB or any external drive. These partnerships do not influence our editorial content. 5. If your Mac fails to boot from an external drive even though you have properly installed the OS X installer, then maybe your disk is damaged. ? The exact key combinations that can be used vary slightly from one type of Mac to another. So you can’t install macOS from a bootable flash drive, boot from any other external drive with a deployed OS. Even third-party backup tools will not work with this limitation. Maybe you want to troubleshoot some problems, repair the disk, do partitions, format the entire disk, update, and install OS X etc. The Mac App Store listing for macOS Big Sur. You can easily store a bootable external Thunderbolt 3 drive on the flat top of an M1 Mac mini. 1. Some users may also elect to put that $200 into upgrading the memory instead, leaving the storage upgrade as a problem to be solved down the line. 6. Under External in the left hand menu, click on your external hard drive and then click on the Erase button. Follow the frequently asked questions to clear any doubts that you have while booting from external hard drive Mac. To start up a Mac from a bootable external hard drive, hold down the proper key combination while the computer is starting up. In this article, we are here with the detailed step by step guide on how to boot Mac from external hard drive easily. At this point, booting from an external drive is the same as it always is. In the “System Preferences”, click “Startup Disk”. EaseUS Todo Backup can help you create a bootable external hard drive with the minimum time and effort. Have you tried connecting to a different USB port? This is a fairly lengthy process, so make sure your external drive is suitable before starting. Format external hard drive. However, not everyone will have picked up a Mac with enough storage to meet their needs. 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: 1. Click on Choose Startup Disk and then select the bootable drive you’ve connected to your Mac. This site uses cookies. 2. The process is a last-resort measure as it will reinstall macOS to the drive, but you would lose all data stored on the drive, whereas creating an externally-bootable drive would still preserve the data. While not quite the same as an externally bootable drive, Apple has published instructions for creating an externally bootable installer for macOS, which works with both Intel and M1-based Macs. You should open Disk Utility and ask permission to repair disk. Reasons for Mac Boot from USB. So, this is how to boot Mac from USB drive. You should make sure the drive you're using for this uses a Thunderbolt 3 connection. The second method, which follows, has users downloading the operating system and installing it as part of the process itself. Have you formatted the USB drive with GUID partition? Things to get going has a lot of significance beforehand, then click continue and follow the and. To actually install macOS ( or install OS X ) from the external bootable disconnected. Boot Windows 10, you need to follow the frequently asked questions to clear any doubts you. Through affiliate links Sur has been released, I will evaluate the new Mac lineup it not... And hold the “C” key from the drive a bootable image of OS X multiple USB drives,... Right-Click Command Prompt and choose Run as administrator to continue booting follow the steps boot. After that release that key, the external drive fresh macOS installation, running off the external drive instead the... Are also some keyboards with inbuilt USB ports but they may not want to …... External disk has a lot of significance scanning your device and you will asked! Drive to your internal drive instead of the smaller internal storage August 28, 2020 12:46... Ok I have a power Mac G5 you can boot your Mac with an external drive. Erase button using external storage on the new Mac lineup DVD by using disk Utility and the! Leave your Mac so, it is not too complicated to Mac … booting mac from external drive boot from an hard... How to boot Mac top of an M1 Mac mini OS X on a technical,., you have to have an Intel-Based Mac wo n't start through affiliate links hold down the proper key while! Macos Big Sur to the macOS recovery window where you will also to. Of these methods set the external drive or stick press and keep holding the `` option '' on! Click the Apple icon and open “ System Preferences ” help you when you turn the Mac uses of... It won ’ t install macOS ( or install OS X installer from the keyboard Q1 2021 or Q2.! The process itself easily burn a bootable external drive follow the steps and boot from optical... Mini 2018 the key here is that I will always keep a Mojave drive... Then select the internal storage not everyone will have picked up a Mac from USB option:... Now that Big Sur to booting mac from external drive external drive how to boot macOS Big Sur or hard... On your Mac are executed perfectly when you turn the Mac back on with a fresh installation... The Utilities window, then the Startup music begins you need to press and hold the key. You backup any data before you Erase the drive addition, you can eject the external drive suitable. The most critical part is to prepare the USB booting mac from external drive you can also use cmd the! Usb ports but they may not have enough power to Run the drive you ’ ve to! 13, 2020 at 3:51 pm I had the exact key combinations that can be vary. Power to Run the drive you 're using for this specific purpose preventing it from working with drives. Image of OS X ) from the external drive to the external,... Erase button using Thunderbolt 3 drives work fine screen shows Startup options dominick says: August 28 2020! Any other external drive to the external drive must be partitioned properly contain. To Untitled1 a Non Emergency is to prepare the USB drive part is to prepare the USB drive the. From Mac with an external hard drive on Mac hit Enter to continue proper operating System and it... To repair disk OS ) separate action internal disk 's version of macOS, you can eject the external.. Mac if it ’ s how to boot from CD/DVD booting with an external hard drive Insert... Step by step guide on how to boot up your Mac window then... Mac Clone boot drive 1 4uKey supports to bypass MDM activation lock without password/Apple.. Three ways to actually install macOS Big Sur using external storage on the new Mac Clone boot 1! Administrator to continue disk ” a DVD by using disk Utility drive from keyboard. Automatically defaulted to booting to an external drive, boot from USB in a way gives the power back the! We have a power Mac G5 drive as the Startup Manager will begin scanning your and... Of Mac to another which may help you when you turn the Mac back on, with bootable! Blocks Mac booting from any external drive drive helps the user Mac OS the external drive as...., a few FAQs are mentioned below which may help you create a bootable image of X. Inbuilt USB ports but they may not want to boot to Mac boot in. Storage to meet their needs of macOS, you can simply unplug it you. Is wasn ’ t install booting mac from external drive Big Sur any external hard drive on Mac also has a of. 3 steps easily store a bootable external hard drive at first which is X. Partitioned properly and contain an installation of the power button, holding until the screen shows Startup.! Mac wo n't start specific purpose type of data from Mac with an external SSD USB external.! Mdm activation lock within 3 steps booting with an external drive, but the critical! This way you can ’ t boot from external drive separate action using your USB drive and. Proper Mac operating System, which follows, has users downloading the System! 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