To resolve issues playback issues on Google Chrome when using a Mac, please follow the steps below. If you are using Chrome browser on a MAC device running OS X 10.9.5 or below, we strongly suggest upgrading to a newer version of Apple's operating system. 

1. Open 'Settings' in your Google Chrome Browser. 
2. Choose ‘Default browser’ from the settings menu on the left hand side. 
3. Choose the "Advanced' option at the bottom of the screen.
4. Scroll down to ‘System’ and switch “Use hardware acceleration when available’ to OFF.