Im also soon going to swich my old broken AMD out for a gtx765M.
I have read most of the guide from "https://forums.macrumors.com/threads/2011-imac-graphics-card-upgrade.1596614/"
But im in still in doubt of how this will turn out since I only have El capitain on my imac currently.
As I understand I need at least High Sierra to use this nvidia card.
But how do I install high sierra on this iMac when my amd GPU are broken ?
I tried to make the dosdude USB high sierra installer but as soon as i choose that usb drive it just goes to complete grey screen. Making me think that installer tries to use the dedicated gpu and not the system gpu. I am booting into El capitain at the moment, I have removed all the amd kext files to try to disable the dedicate gpu and use the system gpu.
My system is very very laggy and im actually unsure if its still the AMD card that is semi working or I now am on the system gpu. I have some color stribes on my screen that appeared after my 5. bake with a heat gun
Reason im in doubt is because i read Dosdude wrote its not possibel to disable the dedicated gpu on iMacs - that only works on macbooks etc - at least thats how I understand that from dosdudes site.
So to wrap it up.
1. Is it possibel if I installed the nvidia webdriver into my El capitain - just to install the gtx765M and make it work.
2. Or do I need High Sierra or Mojave installed first on a hard drive (since osx installers just goes to a grey boot screen).
3. Of corse I then need to high jack a never mac that does allow Mojave to be installed on a external harddrive - that I then install in my imac.
Hope it makes sense.
I have read most of the guide from "https://forums.macrumors.com/threads/2011-imac-graphics-card-upgrade.1596614/"
But im in still in doubt of how this will turn out since I only have El capitain on my imac currently.
As I understand I need at least High Sierra to use this nvidia card.
But how do I install high sierra on this iMac when my amd GPU are broken ?
I tried to make the dosdude USB high sierra installer but as soon as i choose that usb drive it just goes to complete grey screen. Making me think that installer tries to use the dedicated gpu and not the system gpu. I am booting into El capitain at the moment, I have removed all the amd kext files to try to disable the dedicate gpu and use the system gpu.
My system is very very laggy and im actually unsure if its still the AMD card that is semi working or I now am on the system gpu. I have some color stribes on my screen that appeared after my 5. bake with a heat gun
Reason im in doubt is because i read Dosdude wrote its not possibel to disable the dedicated gpu on iMacs - that only works on macbooks etc - at least thats how I understand that from dosdudes site.
So to wrap it up.
1. Is it possibel if I installed the nvidia webdriver into my El capitain - just to install the gtx765M and make it work.
2. Or do I need High Sierra or Mojave installed first on a hard drive (since osx installers just goes to a grey boot screen).
3. Of corse I then need to high jack a never mac that does allow Mojave to be installed on a external harddrive - that I then install in my imac.
Hope it makes sense.