Mac System Requirements



Apple computer with an Intel processor


Operating System

Mac OS X 10.6.8 or higher


Prerequisite Software

Microsoft Office for the Mac

Any one of the following in a Professional or Business Edition, licensed and up-to-date:

  • Office 2016 or 2019

  • Office 365 with Office 2016 or 2019 installed

Word, PowerPoint and Excel must all be:

  • The same Office version

  • Personalized with a User Name and Initials

  • Opened at least once

Great Circle Learning software will not run with Developer editions of Microsoft Office or Cloud-only versions of Microsoft Office 365.


Download requirements

When downloading Great Circle Learning software select the Mac version.


Install requirements

Great Circle Learning software must be installed locally on each computer.

The person running the install must have:

  • Full system administrator and software install privilege to the computer

  • Full Control (Read & Write) to ~/Library/ directory and sub-folders


Activation requirements

All Great Circle Learning software must be activated locally on each user's machine.


A serial number is required.

Serial numbers run interchangeably on PC and Mac.

Obtain a serial number by purchasing a license. One serial number can be used to activate the quantity of license seats purchased. A license seat is required for each user's machine. Keep a copy of the serial number in a safe place because once activated on a user's machine the serial number is scrambled for security purposes, which means you will not be able to retrieve it from the activated users machine.

An internet connection that allows unrestricted access to Port 443 and access to the following secure URLs is required:


On each user's computer

  1. Use the Act’n DeAct function on the software ribbon

  2. Enter a valid product activation serial number

  3. Receive immediate confirmation of success


Reassignment of License Seats
Activation uses a license seat. To reassign, you must first deactivate the license seat on the machine where it is currently in use while the software is still installed.


Deactivation requirements

All Great Circle Learning software must be deactivated locally on each user's machine while the user's profile is still in place.

An internet connection that allows unrestricted access to Port 443 and access to the following secure URLs is required:


On the computer you want to deactivate

  1. Use the Act’n DeAct function on the software ribbon

  2. Receive immediate confirmation of success


Recognizing that there may be times when deactivation is not possible due to circumstances beyond your control, we recommend that you keep an accurate list of users. You will need to contact Great Circle Learning to handle the deactivation for you. You may use our Deactivation Form. Our method will deactivate all seats on the serial number. All users will need to reactivate.


Anti-virus software

Antivirus software can interfere with or prohibit the installation and/or the activation of our software. If possible, please temporarily disable your anti-virus software before installing Great Circle Learning software.

If your computer otherwise meets these System Requirements but you are experiencing difficulty installing or activating, please uninstall using the computer's Control Panel, disable your anti-virus software, re-install the Great Circle Learning software and then re-enable your antivirus software.

Some anti-virus software allows settings that automatically disable add-ins. If such a setting is in place in your organization an exception will need to made to allow Great Circle Learning software to run with Microsoft Office.


User Requirements

All users must have a Word Macros Security set to allow macros to run

Full Control (Read & Write) to the following paths: 

  • ~/Library/Application Support

  • ~/Library/Preferences


To run a PC version on a Mac

You must have a Mac with an Intel-based dual processor. The software, installer, and user requirements are the same as those listed in this document for the PC.

Install and run Microsoft Office and GCL software on the Microsoft Windows side of your system, either at native speed using Boot Camp or under a parallel operating system  partition using a third party product such as Fusion or Parallels.




Install trouble

If you run the install and do not see the Great Circle Learning software added to the host application (Word or PowerPoint) go to Control Panel > Programs and verify the following:



Make sure Microsoft .NET Framework 4.6 or higher and Microsoft Visual Studio 2010 Tools for Office Runtime are installed



Verify that the Great Circle Learning software is in the list of installed programs



In the host application, Word or PowerPoint, click on File > Options > Add-ins and look to see if the Great Circle Learning software is in the list of Inactive or Disabled Add-ins. If so, enable the add-in.


If the add-in will not stay enabled, verify that the user has the required User Privileges listed above


Activation & Deactivation

If you cannot successfully complete the online activation or deactivation you will be given a manual activation option. This will occur even if you have an internet connection but are blocked from accessing the required URLs listed below. Since it is much easier to use the online activation, please whitelist the following URLs:


Port 443

Additionally please allow unrestricted access to Port 443. If access to Port 443 is restricted, this will cause activation and deactivation problems. On certain Proxy Servers special rules for authentication may also be required. This is necessary for communication between Digital River servers (our provider) and the Activation/Deactivation program (GCLOnline.exe) which is located in the Great Circle Learning directory of the Program Files folder.


Manual Activation & Deactivation

Performing a manual activation or deactivation is more complex than the online process and requires more steps and time to complete. We encourage you to correct the situation on your system that is preventing online service access. If you must do please carefully read the instructions that will be provided and follow each step exactly as directed.



When a manual deactivation is required and you are unwilling or unable to execute it from the licensed computer, please contact Great Circle Learning with your serial number and proof of purchase. Our method will deactivate all seats on the license key serial number.