Please be sure that your MacOS version 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.
You won't need any other hardware to run e-Source other than your computer. However, to listen to audio resources, you may need external speakers.
e-Source performs best over a broadband internet connection.