What SL viewer will work on my new MacBook Pro (OS X LION)

[Storm Clarence 495]

I have had zero problems using Firestorm with a MacbookPro. 

[Storm Clarence 495]

I have had zero problems using Firestorm with a MacbookPro. 

[Rolig Loon 26,621]

If your firewall is blocking outbound TCP port 12043, then teleporting, viewing the World Map, crossing regions, and related activities won't work and may cause unexpected crashes.  Check your firewall settings  >>> http://community.secondlife.com/t5/English-Knowledge-Base/Using-Second-Life-with-a-firewall/ta-p/1304539 . 

[valerie Inshan 5,259]

Your issues are typical of a weak internet connection. Let me guess: are you using wireless? There is no reason why you couldn't run the latest viewer on the new MacBook Pro if you use a regular Ethernet 100 cable. OS X Lion (after some difficulties in the beginning when it was released last year) now supports SL perfectly.