Thank you for your reports! There have been some known issues with MacOS and StarCraft II in particular. The mouse scrolling issues can usually be fixed by CMD + TAB out then back in or by forcing windowed mode CMD + M.
Could you provide us with the system information? Click on the Apple Menu and then “About this mac.” Please include the mac model, processor, memory, and graphics.
As technical support, we help with gathering information on occasion, but we are not the developers. We assist with technical issues that can be resolved through troubleshooting and present workarounds if available. For issues that appear to be a bug and needs attention from folks who can make the necessary changes, the #bug-report forums is recommended since the appropriate team will monitor the bug report forums 
We’ll continue to gather and track your reports here, and if we have any new information on the situation, we’ll do our best to keep everyone updated on the matter. Thanks again, everyone!