mad849 Posted March 2, 2021 Share Posted March 2, 2021 Hello all, I am trying to install Big Sur on my thinkpad W541 the installation gets past the initial install page and stops at this error I am attaching a screen shot any help would be greatly appreciated. Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/ Share on other sites More sharing options...
etorix Posted March 3, 2021 Share Posted March 3, 2021 Almost there! The last line is normally followed by the OS X graphical boot. You need to explain which bootloader you're using and how you've configured it. Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752305 Share on other sites More sharing options...
mad849 Posted March 3, 2021 Author Share Posted March 3, 2021 (edited) Thanks for the reply etorix, I am using latest opencore and followed opencore settings via their website I will attach my efi and another screen shot, I reinstalled again to see if it would load to Os screen left it overnight and found it hanging again. Edited March 3, 2021 by mad849 wrong upload of files Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752308 Share on other sites More sharing options...
mad849 Posted March 3, 2021 Author Share Posted March 3, 2021 config.plistOpenCore.efi Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752309 Share on other sites More sharing options...
etorix Posted March 5, 2021 Share Posted March 5, 2021 According to the guide, there should be a patch _OSI -> XOSI in the ACPI section since you're using SSDT-XOSI. Also your K1100M/K2100M GPU is only supported up to High Sierra. If you want Big Sur, you will have to disable the dGPU. Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752493 Share on other sites More sharing options...
mad849 Posted March 5, 2021 Author Share Posted March 5, 2021 On 3/3/2021 at 9:43 AM, etorix said: Almost there! The last line is normally followed by the OS X graphical boot. You need to explain which bootloader you're using and how you've configured it. Thank you both for your replies, so I should use a patched SSDT-XOSI file in the ACPI Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752499 Share on other sites More sharing options...
etorix Posted March 6, 2021 Share Posted March 6, 2021 No, there should be a patch in the ACPI>Patch section of OpenCore config.plist so that all OS calls to _OSI() are redirected to XOSI() in the SSDT. Spoiler Patch Info This section allows us to dynamically modify parts of the ACPI (DSDT, SSDT, etc.) via OpenCore. For us, we'll need the following: OSI rename This is required when using SSDT-XOSI as we redirect all OSI calls to this SSDT, this is not needed if you're using SSDT-GPIO Comment String Change _OSI to XOSI Enabled Boolean YES Count Number 0 Limit Number 0 Find Data 5f4f5349 Replace Data 584f5349 The alternative is to use SSDT-GPIO together with VoodooI2C kext, and then not to use SSDT-XOSI. But this probably requires a trip to Linux or Windows in order to precisely identify the trackpad and identify which of the many Voodoo kexts are required. Quote Link to comment https://www.insanelymac.com/forum/topic/346874-big-sur-stuck-on-installation/#findComment-2752613 Share on other sites More sharing options...
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