DVMT pre-allocated memory >= 96MB) will pass the assertion/kernel panic. Now let's come back to our main topic, Dedicated Video Memory >=64MB (i.e. (equal to the value of DVMT pre-allocated memory) If DVMT pre-allocated memory in BIOS settings is larger or equal to 128MB, the StolenMemory that could be detected by OS is (DVMT) MB. In general, if DVMT pre-allocated memory in BIOS settings is less or equal to 96MB, the StolenMemory that could be detected by OS is (DVMT - 32) MB. If Dedicated Video Memory = 128MB, then DVMT pre-allocated memory in BIOS settings is 128MB. If Dedicated Video Memory = 64MB, then DVMT pre-allocated memory in BIOS settings is 96MB.
If Dedicated Video Memory = 32MB, then DVMT pre-allocated memory in BIOS settings is 64MB. If Dedicated Video Memory = 0MB, then DVMT pre-allocated memory in BIOS settings is 32MB. Open the Screen Resolution window, click the Advanced settings and check Dedicated Video Memory.Īfter I played with changing DVMT pre-allocated memory in BIOS, the following pattern can be found. STEP 1: Check the current DVMT pre-allocated memory size. (3) We can try to modify BIOS but cannot pass the security check during flashing modified BIOS. (2) OEM will not unlock these advanced settings/menus for us. (1) the default value of DVMT pre-allocated memory in laptop BIOS is 32MB.
Kernel panic will happen if the DVMT pre-allocated memory in BIOS settings is lower than 66MB.(based on experimental data not sure please correct me if I was wrong.) This is not a big deal for Desktop PCs users, because one can easily change the DVMT pre-allocated memory in BIOS.īut this is catastrophic for laptop users, because However, Apple raised the minimum stolen memory in the AppleIntelBDWGraphicsFramebuffer binary of OS X Yosemite 10.10.3. The basic idea to let Intel HD Graphics 5500 work is still injecting AAPL, ig-platform-id. If you have Intel HD Graphics 5300 or other IGPU models supported by AppleIntelBDWGraphicsFramebuffer.kext, you can try it by yourself.ĭetailed framebuffer information and this guide can be found on my blog. The basic idea to make Broadwell's integrated graphics card work does not change. Intel HD Graphics 5500 on OS X Yosemite 10.10.3 Building a CustoMac Hackintosh: Buyer's Guide