In this case, we are going to use the drive named Destination Drive. You can also use our clone tool built into the latest version of Drive Genius 6.ĭisclaimer: We do not know how long this utility will work as it can be changed without notice.Ĭreate a bootable external hard drive using ASR via terminal on macOS Montereyġ) We will want to find a suitable hard drive with enough free space to support your internal hard drives data. Provided below are steps on creating a bootable external hard drive using the ASR utility. This means you are only able to use this external bootable drive on the computer that created it. Secondly, it is not always possible to boot into other systems that are not the ones that created the clone. This means that it can take around 20 to 30 mins for all the resources to come back to idle when first booting up into your external hard drive. In our test, we created a bootable external hard drive clone of the internal startup drive using ASR.ĭrawbacks to this external bootable drive are the required initial boot-up check on the first startup. This feature creates a Signed System Volume with exact copies of all files with valid cryptographic signatures. We found a workaround to our problems using one of Apple's utilities called Apple Software Restore (ASR). While it still works on most Intel computers, on Apple M1, we were left searching for a suitable solution for our users to have a bootable clone of their internal drive. We called this bootable external hard drive our Bootwell™ drive. In the past, we were able to create a stripped-down version of macOS and allow users to boot into it. We are not able to replicate or have a perfect workaround to this change.
At this time, Apple is the only one capable of creating a Signed System Volume. The new addition prevents any external media from being bootable without a Signed System Volume.
Close to impossible on customized macOS Big Sur and Monterey given the introduction of Apple's Cryptographic Signature Technology known as a Signed System Volume. However, it has become strenuous to get a bootable clone of your internal startup drive in recent versions of macOS. There have been several ways to create a bootable external drive of your internal drive for many years on macOS.
How to create a bootable external hard drive on macOS (Big Sur, Monterey) November 30, 2021
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