This is abandonware formerly found at mowlem-enterprises.co.uk. Copyright unknown.
Use it to change screen resolution on a mac programatically:
scrutil s 2880 1800 16
Last argument is color depth.
The ScreenUtil (scrutil) help page can be invoked using the command "scrutil h". The resulting information is:
scrutil [<option>[<type>]]
Options:
h display this help text
v display version information
n show the number of displays
i show full information about the display(s)
c show the current display mode
d show all supported display modes
r show recommended display modes
s <mode> switch the main display to the given mode
t <mode> set the user's display preferences to the given mode
q exit the application
Mode:
In the set actions above the <mode> is specified as <w> <h> <d> [<r>] where:
<w> is the width in pixels
<h> is the height in pixels
<d> is the bit depth in bits per pixel
[r] is optional and is the refresh rate in Hertz
Types:
The type is relevant only for the i, c, d and r commands. It defines what displays the command applies to:
m report on the main (primary) display only
a report on active displays only
o report on all online displays (online means that a display is attached to the graphics port)
Server Mode:
If no arguments are given then scrutil runs as a server and accepts commands entered on the console.
It runs in a loop until either the q(uit) command or a blank line is entered.
The utility scrutil only works on the built-in or main monitor (display). If you are looking to manipulate the configuration of an external display, you must look elsewhere.