Automatic admission to Mccombs School of Business?

I heard that people in 10% are automatically accepted to UT.
If I make it to the top ten then can I automatically get accepted into Mccombs?
If I can’t then what exactly does automatic admission mean?

No. For 2013 the auto-admit was top 8%. For 2014 the auto-admit is top 7%. That is only for acceptance to the university. Getting into McCombs is not guaranteed. Getting into any major is not guaranteed.