OpenCore 0.6.0 + 10.15.6 = broken iMessage?

So I updated my Hackintosh to 10.15.6 today, and it seemed ok at first, but then it prompted me to sign back into iMessage. My iMessage has been fine since I built the system in March, during which time I've migrated from Clover to OpenCore 0.5.7/8/9 and now 0.6.0) but now it doesn't work ... first it gave me the 'activation error' message, and then it said the user/pass didn't match, and now it's back to activation error. I tried resetting NVRAM but that didn't help. Does anyone have any suggestions?

submitted by /u/TokyoHam
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