vjiethoang Posted May 15, 2021 Share Posted May 15, 2021 Hi i am trying to install mac big sur on dell precision 7720 and follow this tutorial https://osxlatitude.com/forums/topic/15241-precision-7510-opencore-mojave-catalina-big-sur/ but i am getting stuck stuck looking for help 7720_OC_0.6.7.rar Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted May 15, 2021 Moderators Share Posted May 15, 2021 You'll need to post your system's full specs before we could help you. 1 Link to comment Share on other sites More sharing options...
Administrators Hervé Posted May 15, 2021 Administrators Share Posted May 15, 2021 Precision 7720 is 7th gen Kaby Lake when Precision 7x10 (eg: 7510, 7710) are 6th gen Skylake. Post your hardware specs, get to know your hardware and seek to use a setup appropriate to your own computer, not one from a different model whose name looks close to your own. https://dortania.github.io/OpenCore-Install-Guide/prerequisites.html#prerequisites 1 Link to comment Share on other sites More sharing options...
vjiethoang Posted May 17, 2021 Author Share Posted May 17, 2021 sorry about my carelessness. and here are the parameters Thank you for your interest . Hope your help CPU: i7-7920HQ Processor @3.1GHz (up to 4.10GHz) Graphics: HD 630/ Nvidia Quadro P4000 8GB DDR5 Display: 17.3" 4K screen (3840x2160) RAM: 16GB DDR4 2400MHz Disk: Samsung PM961 NVME SSD 512GB (Windows 10) + Apacer 240GB (macOS) Audio: Realtek ALC295 Ethernet: Intel I219LM Gigabit Ethernet Wireless: Intel dual band AC-8265 802.11ac + BT 4.2 USB: 3 x USB3.0 ports + Type C Card Reader: Micro SD 3.0 card Camera: 720 HD Link to comment Share on other sites More sharing options...
Administrators Hervé Posted May 17, 2021 Administrators Share Posted May 17, 2021 So your Precision 7720 is indeed a quad core Kaby Lake model. What kind of disk is this Apacer 240GB? If SATA, all should be Ok. If NVME, it would have to be seen. Samsung NMVE SSDs such as the PM981 and PM991 are known to cause issues so I don't know if the same would apply to the PM961 but it looks like you use it for Windows, not for macOS. nVidia Quadro P4000 dGPU is Pascal, therefore unsupported since macOS Mojave. You'll need to disable (through DSDT/SSDT patching) in order to save your battery life. For the rest, all should be Ok though I can't guarantee you'll obtain 4K resolution on your built-in LCD. You'll just have to identify the exact model of SD card reader to assess compatibility. I'd say it's likely to be a Realtek PCIe device of some sort so compatibility is an open question. Will have a detailed look at your posted OC setup which is incorrect for the moment with settings applicable to Broadcom wireless or graphics among other things. 1 Link to comment Share on other sites More sharing options...
vjiethoang Posted May 17, 2021 Author Share Posted May 17, 2021 I have installed big sur on my dell precision 7720 but i'm having problems: does not accept typeC port trackpad only works 2 fingers without gestures sleep doesn't work F11/F12 brightness keys do not work I need help EFI-7720.rar Link to comment Share on other sites More sharing options...
Administrators Hervé Posted May 17, 2021 Administrators Share Posted May 17, 2021 Re: USB type-C, I suggest you run Hackintool app to try and generate the relevant USB ports mapping for your system. The app will generate kexts and SSDT-table; you can use either or but do not mix them. Re: Trackpad, afaik that's the best you will get with an I2C device Re: Sleep, you 1st need to disable hibernation (see our FAQ section on the matter) and make sure you have injected the correct properties for your USB ports (see above about Type-C ports) Re: Fn-F11/Fn-F12 brightness keys, you may manage to enable those with our documented SSDT patching. Details have been provided in my E7270 guides so look those up. Basically, you'll need to add SSDT-XOSI.aml + SSDT-BRT6.aml to your ACPI patched tables and add BRT6 + _OSI + OSID renaming to your bootloader config, 1 Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted May 17, 2021 Moderators Share Posted May 17, 2021 @vjiethoang Are you sure the SSDT-TYPC is correct for your system? Please post IOReg file using IORegistryExplorer.app v2.1 not 3.0+ 1 Link to comment Share on other sites More sharing options...
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