We have not yet compiled a mac wallet so sorry support for mac is limited at this stage, However I will try and put out a mac wallet in the coming weeks.

With regards to a Masternode I highly suggest a $5 linux VPS for this purpose it is the most straightforward and convenient to setup a Masternode on a linux VPS. Alternatively you can use the windows wallet on a PC but you have to do port forwarding.

Unless you are already quite experienced compiling and setting up masternodes on a Mac, I would not recommend trying to setup a masternode on a mac at this stage, Until I am able to release a compiled Mac binary (as then it will be alot easier for you to do it this way.) I suggest Linux or maybe Windows for the time being.