This specific sub-version added high-quality FPC drum kits and two new piano instruments: Steinway Close Grand and Stage Grand .
Producer Edition users gained high-end tools like Sytrus (FM synthesizer) and Maximus (multiband maximizer) as part of the core package.
for Mac was a significant release because it marked the availability of a Native OS X Alpha version, allowing users to run the DAW on Mac without relying on Boot Camp or Windows. This specific 2015 update focused on refining the transition from FL Studio 11 to the new vectorial UI of version 12. Key Features of the Producer Edition (v12.1.3)
At the time of 12.1.3, the Mac version was still in a developmental stage. FL Studio 12.1.3 Released | Forum