I have found that my S3 and S4 will sync with iCal and contacts and most anything I have tried on Mac (10.8.5) using Samsung's Kies. My frustration has been that I need it to sync with outlook on my Mac. I can't get Kies to recognize Outlook as my calendar. If you are using a newer Mac and iCal and want to go with S4 - I highly recommend it! I absolutely love mine! I have both the S3 and S4 - just updated the S4 to Android 4.3 and still loving it! I continuously go between a PC and Mac in my daily work. I use both Adobe and Microsoft apps and programs - I use MS on the Mac and Adobe on the PC. Connecting, transferring files and backups for S4 to Mac no problems at all! ;-) Go for it!!! If you happen to find a way to sync Outlook on the Mac - would you let me know :-/