After about a week of gpu-switch testing, however, I have to conclude that this solution has its drawbacks too: it works fine after shutdown (including abnormal or forced one), sleep, hibernation, but it does not prevent mbp from switching to dgpu on running graphic demanding apps such as googlemaps in browser. This saved me from frequent overheat shutdowns under blanket just to load the os (after overheat shutdown the system forcibly uses igpu but this state changes back after couple of boots so it becomes necessary to overheat again). The application runs from terminal, uses the same code as gfxCardStatus but writes the setting into NVRAM(PRAM) so machine remains switched to internal GPU on next boot(s)/wake(s). Please note that only source code is there so Xcode is requred to compile the binary. It seems that I have found more reliable or permanent software solution allowing to disable discrete GPU and use mbp (mine is Mbp 8.3 early 2011, Yosemite) with broken discrete GPU (failing to boot) than gfxCardStatus 1.8-2.2.1, namely. Intel HD Graphics 3000 (384MB) + AMD Radeon HD 6750M (1GB)ĪMDRadeonAccelerator.kextĚTI2400Controller.kext ATI4800Controller.kext ATIFramebuffer.kext ATIRadeonX2000VADriver.bundleĪMDRadeonVADriver.bundleĚTI2600Controller.kext ATI5000Controller.kext ATIRadeonX2000.kext ATISupport.kextĪMDRadeonX3000GLDriver.bundleĚTI3800Controller.kext ATI6000Controller.kext uginĪMDRadeonX4000GLDriver.bundleĚTI4600Controller.kext ATI7000Controller.kext ATIRadeonX2000GLDriver.bundle This computer is so close to being a real Mac. ![]() Kernel_task is sucking 600-700% cpu, and there is hardly enough left to spin the beach_ballĭefaults write "Apple Global Domain" NSSupportsAutomaticGraphicsSwitching -boolean 'false' ![]() I am currently "running" 10.8.5, having deleted ATISupport.kext, and AMDRadeonAccelerator.kext It should be able to run quite well by just using the Intel graphics. There are thousands of such broken computers as this model was a lemon. On Early 2011 MacBook Pro's with a dead discrete Radeon HD 6740M chips? How difficult is it to get either Mountain Lion or Mavericks running On the other hand if you want maximum performance all the time, then discrete only will make sure the most powerful GPU is fired up.įor most situations OS X does a decent job of managing power considerations, but if you want a little more control, gfxCardStatus will let you set up GPU power schemes to define which chip is used depending on power source.Building a CustoMac Hackintosh: Buyer's Guide If you want to save as much battery power as possible, leaving it on integrated only will ensure that the power hungry discrete GPU doesn't fire up. A drop down menu provides you with three options: Integrated Only Discrete Only and Dynamic Switching, which is the system default that lets OS X decide which graphics card is required. ![]() Sitting up in your menu bar, gfxCardStatus shows you at a glance which card is currently active, but more than that, it actually allows you to manually switch between the GPUs. That's where gfxCardStatus comes to the rescue. It's often tricky to know which card is currently in use as the switch between the two is seamless. Some newer MacBook Pros have been packing dual graphics cards for a while now, with the ability to dynamically switch between them - integrated for battery life and discrete for performance.
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