Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20) I've recently bought a 2nd hand mac mini with OS 10.4 on it and I own a single user license for 10.5. It looks like it's not possible for me to simply upgrade my 10.5 to a family license. From a legal point of view it would be clearly not be within the license for me to install this copy of 10.5 on the mini, from a technical point of view what are the limitations? Is there functionality that stops working (eg mobile me)? Clearly the right thing for me to do would be to buy a new copy of 10.5 but I'm interested to know what restrictions Apple can impose.