More multicurrency wallets here that you can use on Mac.

1. Guarda Wallet - https://guarda.com - Partially Open source (part of the code is available for the public to view)
2. Atomic Wallet - https://atomicwallet.io - Not Open source
3. Jaxx Liberty - https://jaxx.io - Partially Open source (part of the code is available for the public to view)

Disclaimer: Although I have used the wallets in the past. I am not endorsing any of them