Download of NanoWallet 2.0.14 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app is an intellectual property of NEM Project. NanoWallet for Mac lies within Developer Tools, more precisely Webmaster Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
NanoWallet is a secure interface that connects you to the NEM platform. It is a cross-platform lite wallet written in JavaScript. NCC is using a different way to generate the remote associated with an account. Nano Wallet uses BIP32 to generate it deterministically and make everything easier.
You may want to check out more software for Mac, such as Url Extractor X, Boks or WebPics, which might be similar to NanoWallet.