User profile for user: UNLVS
UNLVS Author
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Radeon RX560 Display issues / startup issues

I have a mid 2010 Mac Pro and I upgraded the Graphics card to Radeon RX560. I noticed that when booting up I do not see the apple screen. It will just boot and will not show up until the login screen. Any idea on what why that is?


The color is also not as crisp as before. I am using the HDMI to HDMI connection for one Monitor and Display Port to Hdmi for the other. When going into settings and display toggling with settings I am not able to get a clean display. Its okay just bright. I have messed with the monitor settings and this doesn't help. I didn't see any drivers for mac on this Graphics card. Any help would be appreciated.

MAC PRO 2010, Mac OS X (10.6.5)

Posted on Nov 5, 2018 10:59 AM

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User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
140,879 points

Posted on Nov 5, 2018 11:14 AM

When adding an approved display from the list for Mojave, if you do not use either a "Mac-Edition" card or a custom-flashed card sold as supporting "Boot Screens" you get no picture until the login screen. It's a feature. This can make alternate use Windows more complex.


HDMI is a consumer-quality interface, invented for HD TV sets up to 1920 by 1080p. Pushing it beyond that requires special settings, cables, and adapters, and sometimes it still does not work properly.


DisplayPort family is the professional-grade interface you should try to use, if your display supports it directly (not with adapters). It has inherently higher bandwidth, runs cooler, and has fewer issues. [Mini] DisplayPort and [Full Size] DisplayPort are just a re-wire -- no conversion except the size of the connector.

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User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
140,879 points

Nov 5, 2018 11:14 AM in response to UNLVS

When adding an approved display from the list for Mojave, if you do not use either a "Mac-Edition" card or a custom-flashed card sold as supporting "Boot Screens" you get no picture until the login screen. It's a feature. This can make alternate use Windows more complex.


HDMI is a consumer-quality interface, invented for HD TV sets up to 1920 by 1080p. Pushing it beyond that requires special settings, cables, and adapters, and sometimes it still does not work properly.


DisplayPort family is the professional-grade interface you should try to use, if your display supports it directly (not with adapters). It has inherently higher bandwidth, runs cooler, and has fewer issues. [Mini] DisplayPort and [Full Size] DisplayPort are just a re-wire -- no conversion except the size of the connector.

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Radeon RX560 Display issues / startup issues

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