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hav tried to boot dual monitors, no avail. can't hot plug like I used to in high Sierra I have 2 dp and can only boot to desktop on dp1.

 

dp2 can't boot, black screen after a few seconds apple logo. any thoughts. I think I have to edit the frame buffer for port. don't know how.

Macintosh’s iMac2.ioreg

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Moving from Installation Guides to  Help & Support section dedicated to Previews and Mojave... 🙄

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name: AppleIntelSKLGraphicsFramebuffer

 

find: 02040a00 00040000 87010000 

 

replace: 03060a00 00040000 87010000 

 

comment:  10.11.4+-SKL-port_0x7-DP2HDMI

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The patch basically remove port 6 (non active port) and enable port 7 which is active for this particular system.

Even thought the comment mentioned El Capitan, it's still the same patch.

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