iMessage & FaceTime Not Working on iMac 27” Late 2013 (OCLP) – Tried Everything, Need Help

Hi everyone,

I’m hoping someone here can point me in the right direction because I’m officially out of ideas.

I’m running macOS Sequoia (latest update) on an iMac 27” Late 2013 using OpenCore Legacy Patcher. Overall, the system is running great — graphics, Wi-Fi, Bluetooth, App Store, iCloud, Handoff, AirDrop… all working perfectly.

SMBIOS in use: iMacPro1,1

The only thing not working:
iMessage and FaceTime

I’ve been fighting this for months and have tried pretty much everything I could find:

• Signed out/in of iCloud multiple times
• Generated new SMBIOS / serials (checked they’re not in use)
• Verified ROM / MLB / SystemUUID
• Reset NVRAM
• Cleared iMessage/FaceTime caches & preferences
• Reinstalled macOS
• Checked date/time, network settings, VPN off, etc.
• iCloud login works fine, App Store works fine

Still no luck. iMessage and FaceTime either fail to activate or just won’t connect at all.

At this point I’m wondering:

Is this a known limitation with OCLP on Haswell iMacs?

• Could iMacPro1,1 SMBIOS be causing issues with iMessage/FaceTime on this model?
• Anything specific I should double-check in OpenCore or OCLP settings?

Has anyone here successfully running iMessage/FaceTime on a Late 2013 iMac with Sequoia + OCLP?

Any recommendation, insight, or “hey I fixed this by doing X” would be hugely appreciated.
Thanks in advance to anyone who takes the time to help

In case anyone wants to check it out :) I can always provide the link of my EFI file

https://preview.redd.it/1928x6t11fag1.png?width=1952&format=png&auto=webp&s=16c9bba44972e0c3424da36fef844193232c273f

https://preview.redd.it/752z27t11fag1.png?width=1226&format=png&auto=webp&s=fac0e2ba33e1aa43450b69f79bf79af1145645ef

https://preview.redd.it/a7xsa6t11fag1.png?width=1226&format=png&auto=webp&s=620709d66482c6fe707d3aaa768e21566a66d618