Getting AMD switchable graphics working on Hackintosh OS X


So this needs a little bit of backstory —
A few months ago, my laptop had died, so I decided to borrow my boyfriend’s old MacBook Pro for a few weeks.
I loved it. I didn’t exactly love the MacBook Pro, but I absolutely loved OS X. The developer tools for my type of work (web development) are just frankly 10 years ahead of their Windows counterparts. It looks far more visually appealing than Windows or even Linux.

So, when I fixed my laptop, I couldn’t settle for Windows. I didn’t want to go out and buy a MacBook Pro — as the hardware I have is already future proof for the next 3 years.

I investigated the Hackintosh community, and to my amazement almost all the hardware was supported out of box and is well documented. But absolutely everyone said that AMD switchable graphics do not work and there is no way to get it to work.
For me to use a system full-time, it has to have full hardware support. This is the main reason why I don’t use Linux. I have to always settle for “oh it works but not correctly”.

I got a copy of the AMD card VBIOS by using the following tool to dump the system BIOS. From reading around, I saw that the VBIOS is around ~63K in size, so I found the VBIOS through trial and error.
I then gave this to Clover (the Hackintosh UEFI boot utility).

This seemed to work. Although I could tell the graphics card was actually Screen Shot 2015-08-31 at 18.33.38initalized by OS X, I couldn’t use it at all. This made me think there must be a way of tricking Apple’s Mux control into activating it.
Some users’ had reported success with tricking the system to use it through some EDID forcing, but this cannot work on my hardware as I know the display goes through the Intel card and there is no way to switch this.

Getting curious, I looked around for a tool that would show more information about the graphical environment.Screen Shot 2015-08-31 at 18.37.09
I found that the card was there, and was available! I was even able to select it and render through it. The FPS was significantly higher than the Intel card, which shows conclusively that there is some rendering going on at the dGPU level.

This made me think of the following problems:

  • This card will only EVER work with OpenGL applications that allow offline renderers. As with this system there is no Mux that allows it to be entirely switched.
  • I will need some way of forcing EVERY OpenGL application to use the AMD renderer. This will probably result in a low-level library hook.

Problem 1 is not able to solved easily, as far as I’m aware, and I’m not willing to waste any time on it.

Problem 2 however, was slightly easier and could be accomplished.
Digging around the Apple OpenGL documentation, I found a function that does what I need to do. CGLSetVirtualScreen()
The problem is calling this at the right time, and inside each targetted application.
Reading further into the Apple developer documentation, I found that even OpenGL application has to call CGLCreateContext() to get an OpenGL context. The sensible way of doing this would be to hook that function, then calling the original, then setting the virtual screen to what we want, then return back to the original application.

And.. it worked!
Screen Shot 2015-08-30 at 19.15.56
I haven’t been able to get anything but Chrome and Chess working with this (mostly as I haven’t tried anything else), and I can’t be bothered writing some system-level thing to do this with every application, someone else can do this if they can be bothered.

The full source code is here in zip form, and includes a build script and an example to run in Chrome. You’ll probably have to modify both the launcher script and the source for your system.
If you cannot do this yourself, then contact me and I can do at a price.

We’ve spent years fighting the gender apartheid, now the Left takes us back


I feel like feminism has honestly achieved a lot in erasing gender segeration in the West.

Well, kind of. When I say feminism, I mean the true moment of gender equality. I don’t for any second mean the whiny Tumblrites who complain about air conditioning.

Feminism has been very successful in promoting STEM fields to girls. As a result, STEM fields each year become closer and closer to a true 50/50 gender balance.
It’s also been very successful in rebalancing the gender earnings gap, with young women now being paid more than their male counterparts.

We’re starting to see gender neutral toilets introduced a lot more, because who would have thought — when people go to the toilet, usually they just want to do their business and leave.

We have mixed-gender schooling, although it is constantly under attack by the feral far-left. We already know that mixed-sex schooling works better here.

The latest attack on equality is by Jeremy Corbyn’s labour party (let’s be honest, we all know how the vote is going to turn out) on mixed-gender train carriages. And, to a point, I can actually understand.
If you’ve ever been on the London Underground (LU) or any busy train during rush hour, you know how personal it can get.
Sometimes people exploit the closeness. Sometimes this exploitation is full on sexual assault.
Since we know that most of the aggressors are male, a quick solution, of course, would be gender-segerated carriages.
Some religions also have rules dictating against contact with the other sex — however I don’t see this as a reason whatsoever to defend this.

Gender segerated carriages, however, wouldn’t solve the fact that some perpetrators are female. And that some victims are male.
Do we then have male only carriages, to protect men from women?Or how about our own personal carriages, because I dicate that I cannot be around anyone?
And for trans-folk, do we ask for IDs before they can enter these gender-segerated carriages? How do we deal with intersex? Will it lead to situations like this?
How do we know how many womens-only carriages to put on? Is it 50% of all the train space? Do we actually expect people to follow these rules on over-capacity services like the LU?

I can see us getting more and more segerated as we import people with third world views and ideologies into Britain enmass — those on the extreme left want to make Britain as comfortable as they can to migrants, and the best way of doing so is to replicate their oppressive culture.
A good example template state for Corbyn might be Sweden, the far-left literal rape capital of Europe.

We have to defend what people have fought so hard to build. We can’t just let years of progress wash down the drain, in search of quick solutions.