Access only runs on Windows, so the only way to have a MAC run it is to have
a newer MAC with a dual operating system, or to use a Windows emulator. Then
once you have installed Access/Office on the MAC machine, all you need to do
is copy your database to their machine.
They have to be running Windows (i.e. booted to Windows using BootCamp
or running Parallels) or a Windows emulator (do an internet search for
"windows emulator for macintosh"), or you have to use some kind of terminal
service to a Windows server (check with appropriate technical support about
that).