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DW1520 a.k.a BCM43224 and macOS monterey


majora

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You'd have to explain in details the various steps you followed to try and recover support for your DW1520 card in Monterey but, as stated here several years ago, Big Sur dropped support for Broadcom BCM43224 chipset so follow the suggested/recommended procedure to try and regain support for your card.

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I used this card in big sur with IO80211Catalina.kext and the patch "AirPortBrcm4360 kext for unsupported Mac models" in this forum, where everything is perfectly explained. In big sur everything is fine and the card works. But when I do the same in monterey it gets kernel panic. If I remove the IO80211Catalina.kext monterey starts normally. Apparently in monterey the patched kext doesn't work and I'm trying to find out why.

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Yes, exactly. I used SMBIOS for MacBookPro12,1 with these patch:

Find:    4D61632D32453646414239363536364645353843
Replace: 4d61632d45343343314332354434383830414436

But then I tried without patch with the original IO80211Catalina.kext, smbios MacBookAir5,2 and boot-args "-no_compat_check". In both cases I got a kernel panic.

 

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I tried using OCLP but it doesn't see my wifi card and says there is nothing to patch.
Many thanks for trying to help and much respect to you for sharing your knowledge! Only in this forum I found how to patch IO80211Catalina.kext and everything works fine in big sur.

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According to kronokernel, patch for BCM43224 still works in Monterey (or, at least, it did in the summer of 2021 and Monterey beta days):

https://forums.macrumors.com/threads/macos-12-monterey-on-unsupported-macs-thread.2299557/post-30034783

https://forums.macrumors.com/threads/macos-12-monterey-on-unsupported-macs-thread.2299557/post-30038647

 

I've not looked at what the OCLP solution does in that respect but, assuming it breaks the seal and somehow copies the necessary kext in /L/E or /S/L/E for caching, then the on-the-fly patch (in the bootloader's config file) would work. You'd have to target MacBookAir5,2 or MacBook7,1 for OCLP to install the necessary kext and patch macOS accordingly.

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