preventing sleep during compilation

Harald Hanche-Olsen hanche at
Fri Feb 4 00:13:37 PST 2011

[Scott Webster <sewebster at> (2011-02-04 03:30:33 UTC)]

> Or a way to prevent this problem other than just turning sleep on
> and off manually all the time?

Someone mentioned caffeine, but sometimes the command line is more
useful, especially if you run your port commands from a script.
While “pmset noidle” is running the machine is not supposed to go to
sleep. So you could structure your port script along the lines of

pmset noidle &
... do the work here ...
kill %pmset

You can also use pmset to manipulate the power management settings,
bypassing the System Preferences. See the man page for details.

- Harald

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