Background Check for Apple

Got an offer and contingent upon Background check, anyone else had one done for apple retail (specifically specialist/tech specialist). What do they check? How long does it take? Any discrepancies you've encountered and been fine with?

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official