In my country Economic Crimes Bureau1 checks organizations for legality of installed computer software, sometimes. I'm still not a busyness owner (but I may became one) and it is scary for me to.
As far as I know Apple software is protected by DMCA and recent versions don't even have a box version. DMCA is US law and it means nothing to local police, to confirm the legality of the software the license agreement or license to use the software is required. Such agreements must be on paper otherwise they are have no legal power.
So question is how to get written (on paper) license agreement or license to use the software (Apple OSX)?
1 It's called 'УБЕЗ' in Ukraine and 'ОБЭП' in Russia.
I've already asked related questions on Russian Google Answers, but I couldn't come up with a better place for this question than this site.