I have a Mac mini, late 2012, base model, it's my first Mac and the first time I've used OS X. This machine is labeled as an entry-level machine. I use it mainly for web surfing, email and documents - nothing really heavy. What is the expected lifetime of this machine (I bought it new from Best Buy)? Is there anything I would have to replace to keep it running? I assume the hard drive won't last forever, so that is one item I'll likely need to replace. I'm really enjoying this Mac and, if this is typical of Mac mini's, I'm willing to keep buying them if Apple keeps making them.