I am reusing two old monitors for which I found no custom way to set brightness, contrast, and gamma (see appendix below for full details). On a bright background, the colors look dull and I want to change the gamma correction to something close to a MacBook Pro retina display, which has sharp colors on the same background.
On a Windows computer with the same monitor, I can change brightness, contrast, and gamma for the
NVIDIA GeForce GT 220 graphic card with the utility in
C:\Program Files\NVIDIA Corporation\Control Panel Client\nvcplui.exe. It shows three sliders for brightness, contrast, and gamma that have an immediate effect.
Display Calibrator Assistant (from
System Preferences > Displays) asks to change brightness and contrast with the monitor's buttons and to choose a white point. It says nothing about gamma, and does not change any of the settings.
ColorSync Utility, I was able to view the ICC profile of the monitor and confirm it has gamma correction:
I was also able to load a different profile (that of an LED Home Cinema Display that has sharp and crisp colors) but this made no difference on the monitor:
I have read Set the color profile of my external monitor and Can I calibrate 2 screens to match, without buying expensive gear? and still don't know how to change the gamma. I am on
Can I adjust brightness, contrast, and gamma of a monitor on macOS? If not, why is it impossible?
details on monitors
The monitors are Samsung SyncMaster SA100 and S22A460. The monitor SA100 only has a power button. This page suggests an auto-adjustment by holding the on/off button for 10 seconds. This method works but the result is still dull (it's probably how it came).
I downloaded the latest MagicTune software for
macOS from this page, for
macOS 10.3.9-10.5.7 and the installer says:
This package is incompatible with this version of macOS and may fail to install.
The installation fails. I downloaded the latest version for Windows
MagicTune Premium 64 bit 4.0.36. No program of that name is in install in
C:\Program Files, but when I try to install again I get a warning that the
program is already installed.
I found this page that addresses the same problem. The third option mentions an open-source program, whose link redirects to a blog where I found the tool, which is for Windows only. I installed .NET on a Windows computer and was able to run the tool, but it only controls brightness, not contrast and gamma:
Furthermore, the brightness setting does not port when I connect the
macOS, so the settings are probably saved on the Windows machine
and not on the monitor. The page does not provide the source code for me to have
a play (the 7-zip archive contains the executable).
On a SyncMaster S22A460, where I have buttons to control the display, I can adjust the brightness and contrast but not the gamma.