How to Create a macOS Sierra Installation Boot Disk

How to Create a macOS Sierra Installation Boot Disk

Whatever your feelings are about the "download only" delivery method Apple imposes for its operating system updates you would be well advised to ensure you have a bootable version of the OS for future emergency use. Especially important as the installer automatically deletes itself once it has installed meaning another huge download if you need to reinstall.

By far the easiest way to create a bootable installation disk for OS X is using DiskMaker X from http://diskmakerx.com/. DiskMaker X is free app created with AppleScript that can be used to create a bootable install disk.

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How to Create an OS X Installation Disk: Important Update

How to Create an OS X Installation Disk: Important Update

Every time Apple release new major versions of OS X I create a video showing you how to create a boot disk from the downloaded installer. Most of the time once you've checked the boot disk works you can safely leave it in a drawer until the fateful day you need it! However, an issue with a certificate means that if you don't do something about it now that carefully made boot disk will not work when you need it most.

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