Known Issues
External monitor shows bad image quality
Sometimes
macOS detects an external monitor as TV and uses YCbCr signaling instead of RGB. The issue is described in more details
here.
If this happens for you then please download the file for your monitor from the table below and copy it to the right location:
- El Capitan and newer
-
/System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-{vendor code from table below}/
- Yosemite or older
-
/System/Library/Displays/Overrides/DisplayVendorID-{vendor code from table below}/
The directory
DisplayVendorID-XXXX most likely does not exist in
Overrides and must be created. Reboot your system after installing the file.
If your screen is not listed then please contact
isginf to update this topic with a new file for your monitor.
Problems with Philips Monitor 258B6
If you are among the users who have Mac with USB C port, before using the docking display of the
Philips Monitor 258B6, ensure to install this
driver
in order to work smoothly on the Ethernet.
On page 6 of the corresponding
manual
you can find more information about how to install this driver.
802.1x authentication error
See
HelpNetworkClientSetupMacOS
