Lost-Entrepreneur439 Posted November 21 Share Posted November 21 (edited) I have a PowerColour Radeon HD 7870, and in Sierra and earlier, it works fine, but starting in High Sierra, it only outputs to Mini DisplayPort, HDMI and DVI just show a black screen. Does anyone know how I can patch it? I no longer have a DisplayPort adapter and as this is just a spare system, I'm not really interested in buying another This system is legacy only, I've tried on a UEFI system and it had the same issue. Edited November 21 by Lost-Entrepreneur439 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/ Share on other sites More sharing options...
Harry Betancourt Posted November 22 Share Posted November 22 (edited) You might want to try using a tool like Clover or OpenCore to patch your graphics drivers for High Sierra, as they can sometimes help resolve output issues with older GPUs. retro bowl college Edited November 25 by Harry Betancourt Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828244 Share on other sites More sharing options...
Lost-Entrepreneur439 Posted November 24 Author Share Posted November 24 On 11/22/2024 at 5:52 AM, Harry Betancourt said: You might want to try using a tool like Clover or OpenCore to patch your graphics drivers for High Sierra, as they can sometimes help resolve output issues with older GPUs. but how, exactly? Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828352 Share on other sites More sharing options...
Slice Posted November 26 Share Posted November 26 On 11/24/2024 at 5:06 PM, Lost-Entrepreneur439 said: but how, exactly? This is long and complex procedure depending on your hardware properties. See here [HOW TO] Make Radeon {Desktop or Mobility} be working by using Clover 1 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828415 Share on other sites More sharing options...
PG7 Posted November 26 Share Posted November 26 2 hours ago, Slice said: This is long and complex procedure depending on your hardware properties. See here [HOW TO] Make Radeon {Desktop or Mobility} be working by using Clover Slice, with Clover from version 5155 onwards, after adjusting the order of the kext for the Wifi, if you activate the inject, we still have a gross error... already in this version and previous versions, everything works correctly Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828420 Share on other sites More sharing options...
Slice Posted November 26 Share Posted November 26 54 minutes ago, PG7 said: Slice, with Clover from version 5155 onwards, after adjusting the order of the kext for the Wifi, if you activate the inject, we still have a gross error... already in this version and previous versions, everything works correctly As far as I remember the problem with WiFi kexts injection was resolved in revision 5157. New version 5160 contains all improvements and has no such issue. 1 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828422 Share on other sites More sharing options...
PG7 Posted November 26 Share Posted November 26 1 hour ago, Slice said: As far as I remember the problem with WiFi kexts injection was resolved in revision 5157. New version 5160 contains all improvements and has no such issue. As soon as I activate the inject option I get this crash with Clover r5156 and newer print Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828426 Share on other sites More sharing options...
Lost-Entrepreneur439 Posted November 28 Author Share Posted November 28 On 11/26/2024 at 12:47 PM, Slice said: This is long and complex procedure depending on your hardware properties. See here [HOW TO] Make Radeon {Desktop or Mobility} be working by using Clover Is there an OpenCore guide for this? I don't really want to switch to Clover as I already have an OpenCore EFI made and there's no easy to read Clover guide like there is for OpenCore (e.g.: dortania's opencore install guide) Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828458 Share on other sites More sharing options...
Slice Posted November 29 Share Posted November 29 On 11/27/2024 at 12:40 AM, PG7 said: As soon as I activate the inject option I get this crash with Clover r5156 and newer print I see a crash with legacy boot not with inject option. Anyway you say crash with 5156. I say the problem was resolve in 5157. On 11/28/2024 at 6:06 PM, Lost-Entrepreneur439 said: Is there an OpenCore guide for this? I don't really want to switch to Clover as I already have an OpenCore EFI made and there's no easy to read Clover guide like there is for OpenCore (e.g.: dortania's opencore install guide) No guide for OpenCore. Clover guide is here Clover_Of_Khaki_Color_5160-en.pdf 1 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828484 Share on other sites More sharing options...
chris1111 Posted November 29 Share Posted November 29 (edited) 55 minutes ago, Slice said: I see a crash with legacy boot not with inject option. Anyway you say crash with 5156. I say the problem was resolve in 5157. No guide for OpenCore. Clover guide is here Clover_Of_Khaki_Color_5160-en.pdf so the HTML Page no longer useful Edited November 29 by chris1111 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828486 Share on other sites More sharing options...
miliuco Posted November 29 Share Posted November 29 (edited) Don't forget this guide by @cankiulascmnfye, very detailed. @chris1111 The HTML of course is valid, both on your GitHub and in HackyColor HTML, plus it's very easy to read and find info. Edited November 29 by miliuco Typo 1 Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828488 Share on other sites More sharing options...
miliuco Posted November 29 Share Posted November 29 @PG7 I've tried Clover with the wifi injection (IOSkyWalk) with no issue, putting the necessary kexts into the kexts folder and enabling IOSkyWalk quirk plus Csr-active-config=0x803. Did you do so? Quote Link to comment https://www.insanelymac.com/forum/topic/360297-radeon-hd-7870-black-screen-when-using-hdmi-or-dvi-on-high-sierra-and-later/#findComment-2828490 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.