Apple announced today that its second series of ads featuring people who have switched from PCs to the Mac will debut this Saturday and Sunday during CBS’s broadcast of the U.S. Open tennis tournament. The ads feature six new “switchers” including an attorney, a veterinarian, a trucking company owner, a software manager and two students. Apple will continue to run the ads this fall on major broadcast and cable networks, including NBC’s broadcast of the 54th annual Prime-Time Emmy Awards. Print ads will begin appearing in mid-September in major magazines.