@Neotrope looks like I'm struggling with a similar problem. I have bought a used Apollo Twin Thunderbolt after I had to send back a brand new Apollo Solo TB3 because my old MacBook Pro 2015 TB2 was not able to host that new Apollo despite having tried a hand full of adpaters. So I have this Apollo Twin TB2 now which perfectly connects to my old MacBook Pro, but since 3 days I am waiting for my device transfer to complete which got stalled since.
I have a live session tomorrow and really need the Apollo to run my plugins. I have a Double Quad UAD 2 Satellite system which works fine, but for live music I need my plugins to run latency free on the Apollo in ARM mode.
Yet Every time I choose the "Transfer used Hardware" option it says in a red info bar "These cards have already been requested to transfer". Since 72 hours the same message. No progress yet.
I have already opened a support ticket 826821 some days ago, but unfortunately it's magically silent in there and I am unable so far to reach any UA staff on the phone.
Please help a musician who loves recycling and please help us with our fabulous used UAudio hardware! It's a shame to have this awesome hardware laying around without being able to use it because we customers can't help ourselfs and the only option used hardware customers have seems to wait for the ultimate resolution of support tickets.