Wallet.dat backup which Ive got from my windows computer is not working on my MAC. By the way, why MAC wallet synchronization is too slow in spite of using current nodes? I have managed to synchronize only %10 in 1 day.
1) You can try to export you priv key from windows and import back on the mac client.
2) Just download and use the linux/mac bootstrap from the
espers.io website.