ICC in OSX compared to OS9
ICC in OSX compared to OS9
- Subject: ICC in OSX compared to OS9
- From: Pam Bishop <email@hidden>
- Date: Fri, 26 Dec 2003 08:45:03 -0500
For what it's worth-
Printing with an Epson SP 2200 on a 17-inch iMac from Photoshop 7
targeting canned paper profiles (No Color Adjustment) I got fair
fidelity from screen to paper in 10.2. After the upgrade of the OS to
10.3.1, and in 10.3.2, also Photoshop to CS, the color went haywire
with a magenta cast. On upgrading the OS, I had attempted to manually
purge Gimp-Print (the driver that would not die), and also deleted all
bits of, and reinstalled, the latest driver from Epson. Nothing worked.
Among other experiments, over several weeks, I tried numerous display
re-calibrations with the Apple Calibrator. I noticed that the 'Native
Gamma' value given in the Calibrator, which I had recorded as 2.12
after the initial upgrade to 10.3.0, and which was the same as in
Jaguar, was now reported as 2.42, quite a differential (and when the
'Native Gamma' box was checked, the screen darkened considerably).
Tried different settings, tried returning to the generic 'iMac' display
profile which I thought would equate to the factory setting, but the
printing problem remained.
While on the phone a few days ago yammering at some length at a
second-tier Apple tech, who hadn't a clue about the gamma (though he
found that an iMac there running 10.3.2 had a similar 'Native Gamma' of
2.4x) but suggested removing the entire contents of the
Library/Printers folder, which I did, I was fiddling with the ColorSync
Utility, and found the 'Reset to Factory' option on a popup menu in
Devices-Displays. I clicked. Lo and behold, the next morning I tried to
print and the color aberrations were gone (Sallow skin tones sallow, no
longer rubicund, etc.) Something in the OS upgrade, Gimp Print and/or
Colorsync interference, was the bolloxing agent? Preventing access, or
correct conversion, to the ICC profiles?
I relate this in case the circumstances apply to someone else's Apple
display, which might need to be returned to factory (if that was the
trick) before recalibrating, with whatever equipment.
Pam Bishop
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