tldr/pages/osx/bless.md

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# bless
> Set volume boot capability and startup disk options.
> More information: <https://ss64.com/osx/bless.html>.
- Bless a volume with only Mac OS X or Darwin, and create the BootX and `boot.efi` files as needed:
`bless --folder {{/Volumes/Mac OS X/System/Library/CoreServices}} --bootinfo --bootefi`
- Set a volume containing either Mac OS 9 and Mac OS X to be the active volume:
`bless --mount {{/Volumes/Mac OS}} --setBoot`
- Set the system to NetBoot and broadcast for an available server:
`bless --netboot --server {{bsdp://255.255.255.255}}`
- Gather information about the currently selected volume (as determined by the firmware), suitable for piping to a program capable of parsing Property Lists:
`bless --info --plist`