I think you are out of luck, I don;t think you can download it from anywhere else.
Microsoft Remote Desktop 8 For Mac Download
Maybe also look into http://cord.sourceforge.net
Microsoft Remote Deskop is an effective free tool for managing remote-desktop connections from a Mac. Perfect for those who travel frequently, or those who have a Mac/PC environment at work that. Download microsoft remote desktop mac 10.6.0 for free. System Tools downloads - Microsoft Remote Desktop by Microsoft Corporation and many more programs are available for instant and free download. Use Microsoft Remote Desktop for iOS to connect to a remote PC or virtual apps and desktops made available by your admin. With Microsoft Remote Desktop, you can be productive no matter where you are. GET STARTED Configure your PC for remote access using the information at https://aka.ms/rdsetup.
Why don't you try downloading it on your computer and see if you can extract the file from the download? Right-click and show package content.
PS: Is that: https://www.microsoft.com/en-us/download/details.aspx?id=465 the right client?
I can't test it since I don't have a MAC at work.
or this one: https://www.microsoft.com/en-us/download/details.aspx?id=18140
Edited Apr 21, 2015 at 22:53 UTC
Windows Remote Desktop Mac Download
Key Features
Latest Version: 8.0.44
Rated 3/5 By 2,707 People
What does Microsoft Remote Desktop 8 do? With the Microsoft Remote Desktop app, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help you get your work done wherever you are.Getting StartedConfigure your PC for remote access first. Download the RDP assistant to your PC and let it do the work for you: https://aka.ms/rdsetupLearn more about remote desktop apps here: https://aka.ms/rdappsFeatures•Access to remote resources through the Remote Desktop Gateway•Secure connection to your data and applications with breakthrough Network Layer Authentication (NLA) technology•Simple management of all remote connections from the connection center•High quality video and sound streaming with improved compression and bandwidth usage •Easy connection to multiple monitors or projectors for presentations•Print from Windows applications to any printer configured on your Mac•Access local files on your Mac from your Windows applicationsWe're improving our app - learn more! https://aka.ms/rdmac-preview
Download for MacOS - server 1 --> Free