dtw_2005 Posted December 9, 2020 Share Posted December 9, 2020 I'm new to all this, and I don't really know what I'm doing. I also have an E7450 with an Intel Core i5-5300U. I have essentially the exact same experience as described by @ronald77. I followed the Big Sur instructions via The OS installs successfully. I get through the setup and get to the desktop; however, once I reboot or power off and power on, the OS boot progress bar gets about 1/3 through and then restarts. Occasionally, I get the error screen as referenced in the initial post, which after passing, it then just continues to the same boot loop cycle. All of the responses by @ronald77 seem in-line with my experience. I'm on Bios A10 as that seems to be the one mentioned in the guide referenced but for a previous version of macOS, so I wasn't sure if I should updated the bios further. I've loaded the default values and ensured that the AHCI and UEFI settings are in place. I'm not sure about the "FIle Vault" question, but I did not format the SSD to have any of the encryption options, which maybe means I don't have "File Vault" enabled. I have yet to replace the wifi card, but have a dw1560 on order. @ronald77, did you by chance figure out how to move forward? Link to comment Share on other sites More sharing options...
ronald77 Posted December 9, 2020 Author Share Posted December 9, 2020 @dtw_2005 No, I'm stil stuck at the same point as you... Link to comment Share on other sites More sharing options...
dtw_2005 Posted December 12, 2020 Share Posted December 12, 2020 So, I had some success. I reinstalled as per the above guide. since I already had the image created and it at least boots to the post setup and lands on the desktop once. However, after install, before rebooting, I mounted the EFI volume and replaced the files with the OC 6.2 package posted here. I haven't tested further yet, I'm still waiting on my wifi card, but it does seem to reboot successfully to the OS without bootlooping. Woohoo! Maybe there is a bad kext file in the 6.3 version with the specific e7450 model that both i and @ronald77 have or maybe there is an issue with the 6.3 version all together? Both are the work of @Jake Lo , so thank you. @Jake Lo any ideas? Again, I really don't know what I'm doing, so apologies if I'm not providing good info. Note that the "Open Core" boot option does nothing, I have to set the HDD boot option as primary. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 12, 2020 Moderators Share Posted December 12, 2020 since it's working for you, I'll update 0.6.2 to 0.6.4 and upload it later Link to comment Share on other sites More sharing options...
dtw_2005 Posted December 12, 2020 Share Posted December 12, 2020 Awesome, Thank you. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 13, 2020 Moderators Share Posted December 13, 2020 OK OC 0.6.4 uploaded here. Tested to boot without any issue Link to comment Share on other sites More sharing options...
dtw_2005 Posted December 14, 2020 Share Posted December 14, 2020 It seems to be working well so far. I think I get several errors on boot before the apple loading screen, but it seems to be working well. Many thanks @Jake Lo! I have what I believe are a few open core error log files in the EFI volume that may correspond to the output I see on pre boot. It seems to creates one on every boot. I'm attaching a couple if it gives any insight. I'm attaching 2 from the 0.6.2 version as well as the 2 from the 0.6.4 version. Currently my brightness control isn't working, but I do see instructions in the previously mentioned guide for a previous version of macOS that I'm looking into. Again, Thank you! Archive.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 14, 2020 Moderators Share Posted December 14, 2020 Grab a screenshot of the boot errors and post it. Those are are debug files, I left it on purposely incase of issue. You can stop it by turning off debugging in the Config file under Debug Link to comment Share on other sites More sharing options...
ronald77 Posted December 16, 2020 Author Share Posted December 16, 2020 I went back to a clover/catalina system... @Jake Lo, would it be possible to replace clover EFI with OpenCore EFI and then update Catalina to Big Sur? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted December 16, 2020 Administrators Share Posted December 16, 2020 In theory, yes. In my own experience, the bootpack remains the same for both macOS versions. Just make sure to use the latest versions of the add-on kexts (eg: Lilu, WEG, etc.). Link to comment Share on other sites More sharing options...
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