I have read many posts and watched videos on how to move personal registrations from older Tyros models and Genes (1) to Genos2. There is even a Yamaha media video which explains how to do it. But I haven't found any way to move (on hard drive and USB drives) from SX900 to Genos2. Some have mentioned Michael Bedesem's software to convert them, but they are for Windows users and I have a Mac. I have hundreds of carefully saved registrations (each named with several numbered changes) for songs that I would love to move without having to reset and save every one of those I love on the SX900. I do agree that the keybed and voices of the Genos2 are superior, but my registrations on the SX900 reflect years of having and playing it since it was introduced. I still take it gigging and find it a wonderful instrument as well - lighter weight and onboard very nice speakers for small venues (and additional non onboard speakers where required.)
I really appreciate the expertise here and if it cannot be done, it would be best to know it from the beginning. I have updated the operating system (for both keyboards) and still working to add the Playlist for Genos2 of songs/recommended styles. I've seen posts on that, but in many cases, I prefer what I had on SX900 as registrations over this list.
Best,
John