So we just became a multi-Mac household. I was able to convince my wife that she needed to replace her broke Sony laptop with a MBA. Nice addition to my 2009 iMac. My wife setup her MBA with her own Apple ID. When I created my own username on it, I used MY Apple ID. Since we are using two different Apple IDs, I have come across a few questions. Can I install apps that I have downloaded/bought on my iMac to the MBA with my Apple ID? Can I install apps with my Apple ID, period? Assuming I have admin password. If so, will they show up under her account (on the MBA)? When installing new apps and updating existing ones, does it matter which Apple ID we use? Finally, is using multiple Apple IDs in one household recommended? Part of the reason she has her own is because she shops the Japanese store. Thanks for the help.