Re: Blessing query



On 1/8/05 9:45, in article
dcknem$18n$1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, "Dan"
<dan.mitchell@xxxxxxxxxxxxxxxxxxx> wrote:

> Would someone please explain what "blessing", as applied to a Mac system
> actually is, when it is needed, and how it is accomplished ?

It tells the machine which copy of the OS to run when booting.

It is more of an OS 9 thing, because with X it is quite hard (perhaps
impossible) to have multiple copies of the OS on the same partition. Though
if you're running on older machine it might need some OS X booting
assistance which blessing can give. (See the bless man page.)

IIRC on OS 9 if you dragged the Finder in and out of a "System Folder", it
would cause that "System Folder" to be blessed.

On OS X, there's a "bless" command in /usr/sbin which will let you do this
stuff yourself (with admin privileges). I suspect the OS X Startup Disk
preferences pane calls bless under the hood.

There's some technical info in the bless man page.

Cheers,

Chris

.



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