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bless:tldr:74737
The command you provided is "bless --mount ${-Volumes-Mac OS} --setBoot".
The "bless" command in macOS is used to set up the bootable disk for the system. It is typically used in situations where you need to specify the startup disk or ensure that the current disk is bootable.
Now, let's break down the command:
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"bless" - This is the command itself.
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"--mount" - This option specifies the volume or disk that you want to bless as the bootable disk. In this case, it uses a parameter called "${-Volumes-Mac OS}", which could be a variable containing the path to the "Mac OS" volume in the "/Volumes" directory.
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"--setBoot" - This option tells the "bless" command to set the specified volume as the bootable disk. It makes the system aware that it should use this volume as the startup disk.
Overall, this command appears to be setting up the "Mac OS" volume as the bootable disk for the system. The use of "${-Volumes-Mac OS}" suggests that the actual volume path might be provided dynamically using a variable or substitution method.