minkirax Posted November 8, 2021 Share Posted November 8, 2021 I am running Catalina at the moment and it works perfectly on my system using Open Core. While trying to install Big Sur, I get stuck during before setup. I have setup EFI folder from scratch using latest Open Core. I tried both prebuilt SSDT as well as custom SSDT using SSDTTime but without success. I have attached EFI Folder and error screenshot System CPU: i7 8700K Motherboard: Asus Rog Strix Z370-E Gaming GPU: Radeon Vega 56 Current OS: Mac OS X Catalina 10.5.5 Quote Errors: No local variables are initialized for method [PXSX] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20160930/psobject-310) ACPI Error: Method parse/execution failed [\_SB.PC18.RP04.PXSX] No Arguments are initialized for method [PXSX] ACPI: Executed 58 blocks or module-level executable AML code ACPI: sleep states S3 S4 S5 EFI.zip Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/ Share on other sites More sharing options...
MaLd0n Posted November 8, 2021 Share Posted November 8, 2021 use coffeelake folder from here. reset nvram one time. https://www.olarila.com/topic/5676-hackintosh-efi-folders-for-all-chipsets-clover-and-opencore/ 1 Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771414 Share on other sites More sharing options...
minkirax Posted November 9, 2021 Author Share Posted November 9, 2021 Thanks to your advise, I was able to successfully install Big Sur. I really appreciate it! Pretty much everything works fine at the moment except for a small display issue. Throughout the installation and even after installation, there's some sort of grainy effect on the screen along with frequent screen flickering. The screen goes black for 1-2 seconds and then comes back to normal. This cycle keeps repeating. Could this issue be because of SMBIOS? At the moment, it is MacPro 7,1. Catalina uses iMac 19,1. However, Apple sidecar wasn't working in Catalina Which SMBIOS would you recommend in my case? i7-8700K (iGPU) + Radeon Vega 56 Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771429 Share on other sites More sharing options...
MaLd0n Posted November 9, 2021 Share Posted November 9, 2021 in ur case u can use iMac19,2 with IGPU enable for intel quick sync with iMacPro1,1 and MacPro7,1 we dont need igpu, but sidecar fail Enjoy! Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771430 Share on other sites More sharing options...
minkirax Posted November 9, 2021 Author Share Posted November 9, 2021 Thank you so much 🙏 I did as you suggested and everything works perfectly including sidecar (which never worked on Catalina) I was wondering if it is safe to upgrade to a higher Big Sur Version or directly to Mac OS Monterey using your EFI Folder At the moment, my version is 11.2.3 and I can see a software update to Mac OS Monterey 12.0.1 1 Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771434 Share on other sites More sharing options...
MaLd0n Posted November 9, 2021 Share Posted November 9, 2021 Just update remap ur usb https://www.olarila.com/topic/14220-video-guide-usb-port-mapping-guide-2021-mojave-catalina-bigsur-monterey/ Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771465 Share on other sites More sharing options...
minkirax Posted November 9, 2021 Author Share Posted November 9, 2021 Thank you so much 🙏 Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771468 Share on other sites More sharing options...
MaLd0n Posted November 9, 2021 Share Posted November 9, 2021 Just Enjoy!!! Quote Link to comment https://www.insanelymac.com/forum/topic/349543-opencore-acpi-exception-big-sur-ae_not_found-during-name-lookupcatalog/#findComment-2771473 Share on other sites More sharing options...
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