Lack of documentation (Realtek provides it only under NDA). Porting a driver is never a trivial task, but this one brought two interesting challenges. Lnx2Mac's Realtek RTL81xx Driver Project Page Overview: Due to the shortcomings of the current Realtek 81xx Hackintosh drivers (such as lack of or limited support of 8111E, 32/64-bit, sleep issues), I endeavored to port the Linux RTL81xx driver to Mac OS X. (Please remember to honor your company's IT policies before installing new software!). Please consider upgrading to Internet Explorer 8, 9, or 10, or trying another browser such as Firefox, Safari, or Google Chrome. VMware Communities will not function with this version of Internet Explorer. In order to provide the best platform for continued innovation, VMware Communities no longer supports Internet Explorer 7.
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