The ProBook 4530s is pretty much the gold standard of Hackintosh laptops. Almost every part of the ProBook 4530s works with Mac OS X: WiFi, audio, ethernet, sleep, bluetooth, USB 3.0, the battery meter, the trackpad, and even the SD card reader. Tweaking is kept to a minimum, since the
HP ProBook 4530s forum on tonymacx86 has more or less figured out everything for you. If you're looking for a truly Hackintosh-friendly laptop, go with this one.
It's even endorsed by tonymacx86 himself.
Unlike for Mac OS X Lion, there's no official method for installing OS X Mountain Lion on the ProBook 4530s. The easiest way to do it is with
Unibeast. After the initial installation of Mac OS X, run the
HP ProBook Installer to enable sleep, sound, and various other features. For details on this part of the process, check the official HP ProBook Installer thread, linked below. If you encounter problems with USB 3.0, Bluetooth, or graphical glitches, you may have to
manually install some additional kexts-- check the "extra" guide linked below for details.
However, even once you get Mountain Lion working, not everything is perfect. For instance, Bluetooth won't work after waking up from sleep, but screen brightness controls won't work
before waking up from sleep. So you'll have to decide which feature is more important to you. Also, Bluetooth doesn't work after a restart (only a cold bootup will make it work), the VGA port is unreliable, and the external microphone doesn't work at all. However, don't let all of these problems with the 4530s discourage you; none of the problems really affect the laptop's usability. In fact, the 4530s actually has fewer problems than most Hackintosh laptops. It just happens that the glitches for the 4530s are better documented.