I recently installed Monterey on Dell Latitude E6440, progression so far (main issue so far bluetooth):
1. I was able to upgrade Big Sur to Monterey!
2. The EFI file link here.
3. I was able to fix the picking list issue via opecone and run test showed me that I'm missing some files, and it ran well!
4. Wi Fi works, sounds, and camera work, I gave up on DW1550, and I reinstalled original card which is Intel Centrino Advanced-N 6235, Dual Band, I also kept the BCM94360CD card, however only one cards shows now, while with Big Sur both cards showed and worked nicely including bluetooth and airdrop!
5. Bluetooth doesn't work, I followed both dortania guide, I was able to see bluetooth goes on, but when I connect my iphone, I get error message on my iphone saying (I also reset both devices to see if it helps, in addition I reset the bluetooth itself:
When I disable the suggested kexts in dortania, the system won't proceed beyond the login screen! So I enabled them!
I have two cards installed:
1. Intel Centrino Advanced-N 6235, Dual Band,
2.BCM94360CD card
The reason that I kept both because in Big Sur, if I remove one of them then the bluetooth won't work nor the airdrop!
I attached the EFI, if you see any thing with the bluetooth setting that I can fix, please let me know!
IOregfiles01212022monterey.ioreg