One of my team members uses Outlook for Mac and needs to sync to Salesforce. The standard Salesforce for Outlook add-on is for Windows only. Is there a similar app for Mac?
Take a look at Maildrop. It will work with Outlook 2011 on the Mac.
You can try Implisit. Implisit connects to the backend of your email server and your Salesforce and therefore works on any platform, including Mac and iOS.
DISCLAIMER: I work at Implisit
Have you tried Riva by Omni Technology Solutions, Inc. http://www.rivacrmintegration.com/ They will sync Salesforce with Outlook for Mac computer system. They have a basic solution for a very minimal cost.
Take a quick look at CloudsPlus it will synch your contact, calendar tasks as well as email to Salesforce and Exchange server email.
You could try and get onto Exchange sync beta then it doesn't matter what OS or device you are on. Check out summer 15 pre release notes for details
An update on this, we use Cirrus Insights and they just released an Outlook version.