HT204074 Multiple Apple IDs on one Mac

Question

I have 2 different user accounts on my MacBook Air. Both users have their own iTunes Library with their own AppleID.
Is my understanding correct that it is not possible to use both accounts independently as only one Apple ID can "use" the Mac at a time ?
Furthermore, if user A has its Apple ID associated to the Mac, user B is unable to use iTunes Match on the same Mac for it's account (at least not for another 90 days) ?
Thx in advance for any solution allowing user A and B to share one Mac (including iTunes) as if it was two physically seperate computers. The goal for me would be to have 1 Mac used by 2 users (each one having it's own account) with 2 Apple IDs (ID 1 for user A - ID 2 for user B).

Answer 1

Hello Kevin and redskylux-
Just wanted to add another post and try to gain some group traction: Apple support has lately been refering users to "check the Apple forums" for solutions. As such, I am hoping Apple management will be parsing and reading these forums for suggestions on improvement and current issues with their products.
From the perspective of system administration and isolating financial responsibility to individual user accounts, the process Apple employs to limit future transfers, even to separate user accounts, on the same machine for 90 days is simply draconian. A server operating system is dedicated to the idea that multiple user accounts are supported on a single physical machine. Apple's current methods would severly retard the abilities for mutliple users to make use of the same machine for using iTunes and related content. For example, user A is allowed to log in to a machine and make use of iPhoto, MS Excel (under Office for Mac), and many other programs while user B is also using an account, via VNC or other remote desktop product from an iPad or a different location off site. That's the whole point: multiple users to the same machine to co-utilize resources.
The iTunes account scenario and a 90 day wait between transfers is a seriously ridiculous constraint. How about every Apple employee who uses a piece of software on an Apple server, must first check to see if any other Apple employee has used the desired software within the previous 90 days? If so, user A must wait until user B has not used the software within the previous 90 days. Sound like a terrible situation? It is!
Come on Apple, surely you can devise a better method.
Separate Mac OS X user accounts, each with separate Apple ID's must have independent access to the materials associated with individual user accounts on the SAME Mac OS device. The above process, at the least, would allow a local backup of iTunes content to a single machine. Having all content backed up to a single machine supports the opportunity for keeping an organized localy controlled backup.
Perhaps the solution will be to create multiple copies of virtual machines on the Mac OS X device and then each user can (with a virtual MAC address) have their own Apple iTunes account on the same machine, without having to sit and wait 90 days for Apple to release the lock?
Hope you find a solution: I am planning to test out the VM solution (real Mac OS X which contains multiple VM Mac OS X machines)