I am trying to download the latest driver for the S90es for Mac. I'm running Yosemite OS 10.10.3 on the Mac. Per Yamaha's download site, download.yamaha.com, the latest driver for the S90es is V1.3.2. I already have 1.3.1 and it works. But everytime I try to download the new version, I get an error message that a problem occurred and the download failed. I want to be able to use the midi port on the Apogee Duet for IOS and Mac and I think I need the new driver version (1/19/15).
Welcome to Yamaha Synth! Sorry you are experiencing problems downloading the driver update.
I just downloaded it (US site) and its seems to be fine. Not sure why you are getting an error message. Which Yamaha site (country) are you downloading the USB-MIDI Driver from? Are you using Safari or Firefox? Do you get the same error when attempting to download any other items for the site?