1. Please be sure that your MacOS matches the compatible versions for e-Source (MacOS Catalina and MacOS Big Sur are not fully compatible with some PP materials). You can check the MacOS version following this guide: https://support.apple.com/en-au/HT201260
2. Be sure that your MacOS is compatible with your e-Source material
Minimum System Requirements
Operating system and browser
MacOS Catalina and MacOS Big Sur are not fully compatible with some PP materials.
You can check the MacOS version following this guide: https://support.apple.com/en-au/HT201260
e-Source runs on most operating systems and browsers, including Internet Explorer 8 and above, Mozilla Firefox, Google Chrome, and Safari. Some content, for instance flash files, may not be supported by all devices.