Maccer Posted October 30, 2021 Share Posted October 30, 2021 (edited) I've been using OC 0.6.8 from the below thread. Now I tried to update to 0.7.4 using the provided EFI, did all those changes that need to be done to the plist, and I can't boot into Catalina. I thought the issue might be about: Misc - Security - SecureBootModel, which is set on the plist as Default (for big Sur). So I changed it after trying with the original setting first, to Disabled for Catalina which is what I have. The problem wasn't there. Pickerattributes is set to 17 as it should be. All I see at startup is "toggle SIP" and "Reset NVRAM". So for some reason it can't find the EFI. I did NVRAM reset and chose Opencore from the Bios options again, doesn't help. Hopefully someone can help me. I've been banging my head to the wall for two days now. 😅 Thanks in advance! WELL, I did a little bit more searching and found my answer. When running any macOS older than Big Sur with OC 0.7.4: UEFI > APFS > MinDate: set it to -1 (minus 1) UEFI > APFS > MinVersion: set it to -1 (minus 1) Edited October 30, 2021 by Maccer I found the solution. Quote Link to comment https://www.insanelymac.com/forum/topic/349462-cant-boot-into-oc-catalina/ Share on other sites More sharing options...
Anto65 Posted October 30, 2021 Share Posted October 30, 2021 UEFI > APFS MinDate = 20200306 MinVersion = 1412101001000000 2 Quote Link to comment https://www.insanelymac.com/forum/topic/349462-cant-boot-into-oc-catalina/#findComment-2770532 Share on other sites More sharing options...
Maccer Posted October 30, 2021 Author Share Posted October 30, 2021 (edited) Oh okay. -1 is bad because it disables those. So I put those numbers recommended and works perfectly. Thank you so much!!! Edited October 30, 2021 by Maccer 1 Quote Link to comment https://www.insanelymac.com/forum/topic/349462-cant-boot-into-oc-catalina/#findComment-2770535 Share on other sites More sharing options...
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