How to Install Zygor Guides on Mac 
If you have just purchased a Zygor Guide and need to install the process will be described below. If you already have Zygor Guides installed and need to update to the latest version, you can find instructions on How to Update Zygor Guides to the Latest Version here.
After purchasing the guide, head over to http://www.zygorguides.com/amember/member.php and login with the username and password you registered when you bought the guide. Inside the Members Area, you will find your guide download/s under the label Product Downloads. Click the link of the guide you want to download.
On the next page, you will see download links for the Windows, Mac, and Manual versions of the guide. Currently, the Windows version is the only one installed with an auto-installer. The Mac version is the same as the manual version, which means you will have to copy and paste the guide files into your AddOns folder manually.
Mac Install:
All of the files in the Mac version of the guide are bundled together in a zip file. Your Mac will automatically open the ZIP file up, as if it were a folder. So you will immediately see the Zygor folders in a window. Simply highlight the folders ZygorGuidesViewer and ZygorTalentAdvisor and copy them.
Now, go to your World of Warcraft AddOns folder. The default location on Macs is:
Macintosh HD \ Applications \ World of Warcraft \ Interface \ AddOns
Once inside your AddOns folder, paste all of the Zygor folders inside there so that the files appear in this location:
Macintosh HD \ Applications \ World of Warcraft \ Interface \ AddOns \ ZygorGuidesViewer
Macintosh HD \ Applications \ World of Warcraft \ Interface \ AddOns / ZygorTalentAdvisor
Now, open up World of Warcraft (the game) and login to your account. At the character selection screen, click the AddOns button at the bottom left corner of the screen. In this list, make sure Zygor Guides Viewer and Zygor Talent Advisor are checked. At the top right of this box check "Load out of date AddOns" and click Okay.
Enter world. If you get errors please see our Troubleshooting section. If you need help using the guide, see our How to use Zygor Guides section.
Install both Alliance and Horde Guides on a Mac:
Install the Alliance guide using the instructions listed above.
On your Mac, go to:
Macintosh HD \ Applications \ World of Warcraft \ Interface \ AddOns \ ZygorGuidesViewer \ Guides
Inside the Guides folder, you will should see:
ZygorGuidesAlliance.lua
Open the Horde ZIP file and go to ZygorGuidesViewer \ Guides. Copy the file ZygorGuidesHorde.lua and then paste it into:
Macintosh HD \ Applications \ World of Warcraft \ Interface \ AddOns \ ZygorGuidesViewer \ Guides
The end goal is to have those 2 .lua files in the Guides folder. After that, it should all work.