Good artists copy, great artists steal.
Mac4Lin is a workaround. So is Macbuntu. In the eyes of Apple, these are just minor infractions in the design department, if at all.
However, Pear OS distro is a blatant copy of Mac OS X look and feel. If you like Mac UI, this is a holiday treat (barring design infringements of course). But then, not all people are into Mac or Linux.
Upon installing Pear OS as Virtualbox VM, I find it wanting. Linux Mint with Mac4Lin and X-Style looks relatively better. But that’s me. Flame wars are not welcome here.