You have probably read replies to similar questions appearing here before.
SQLog is a program that makes extensive use of the Windows API (http://en.wikipedia.org/wiki/Windows_API). This API is a *huge* extension to the C++ programming languages. In the Unix world there are numerous libraries available offering similar functonalities in “small portions” (“curl” for networking, a number of graphics libraries (gtk+ for instance) etc.). But they are *similar* only. They are not a direct replacement. And in SQLog source code a very large fraction of codelines are actually dealing with the Windows API (preparing parameters for function calls etc.). In some cases replacing may be rather trivial (I think replacing wininet.dll with curl would be quite easy) but in other places it would require a complete rewrite of the logic inside the program. It cannot be done by one person in a year. It may take 5 or more man-years.
And this would an investment we cannot justify. A lot of Linux users would love a native Linux version (but only if it is free, mostly), and despite the increasing market share of Apple systems we dont believe the revenue from a Mac version would match the investment.
So there are still no plans for a Mac version of SQLyog.