What are the chances that the Mac version will gain support for multiple addresses? I'm currently running core, but am considering using a second wallet that syncronizes across all my devices nicely (I'd like to use something that I have a bit more control over than blockchain.info's wallet, although that one is nice to). Is there a future plan to make all the different hive versions compatible?
The chances are very high I'd say. I'm planning a few small 1.4.x releases, then a 1.5 that adds support for Waggle from Hive Web, and then a 2.0 release that adds support for BIP32, same way as in Hive Web, with a 12-word passphrase, address changing after every transaction, etc. There probably won't be multiple addresses as in multiple labeled subaccounts with separate balances at the beginning, but it's something that I definitely want to think about.