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2nd beta available. Build 21A5268h. A few little improvements like the return of GPU info in About This Mac or the refresh button in Safari. Bluetooth still buggy, especially after wake. We'll see what other improvements and new bugs it brings... Straight & easy update with Clover r5133 on my Skylake/HD520 Latitude E7270. Much more more complicated affair with OpenCore v0.7.0 on my Haswell/HD4400 Satellite Pro R50-B. From the 3rd reboot of the temp installation partition, laptop goes into a boot loop. On rebooting the original Monterey partition, system went through "xx minutes remaining", hinting the update was actually going through but, on reaching the Monterey desktop, back to beta1.

Had a quick look at your posted EFI. your Kexts set is quite a mess with all sorts of kexts for LAN (no less than 8!). You would really need to sanitise this. Start by identifying your hardware. you said your were using patched UHD530 graphics for iMac17,1, yet your config shows you're using macPro7,1 SMBIOS. Why? iMac17,1 or MacPro7,1 are both compatible with Monterey. As such, no need for -no_compat_check boot-arg though it does no harm of course, just prevents macOS OTA update. you use a single patched SSDT table from Olarilla to patch ACPI; never seen that one before so can't really comment nor say if all is applicable to your own platform, it's not very common.