https://ask.audio/articles/roland-releases-d50-synth-in-roland-cloudprayers have been answered on the roland cloud!!!!!
lucky for me i happen to be running 10.10.5
https://www.rolandcloud.com/catalog/legendary/d-50-linear-synthesizerSpecifications
Maximum Polyphony 16 voice
Sound Generator D-50 Compatible LA (Linear Arithmetic) Synthesis
Waveforms
Synthesizer: 2, PCM: 128
Tune 427 Hz--452 Hz
Sampling Frequency 44.1 kHz, 88.2 kHz, 176.4 kHz, 48 kHz, 96 kHz, 192 kHz
Tones 64 patches/1 bank
*User can make new user banks.
PlugIn Formats VSTi (32bit/64bit), AU
System Requirements (macOS™)
Operating System Mac OS X 10.10.5 or later
Host Application VST instruments (VSTi) version: VST 3.6 compatible
Audio Units (AU) version: V2 Audio Units compatible
CPU Intel(R) Core(TM) i5 or better
RAM 4 GB or more
Hard Disk 100 MB or more
Display/Colors 1280 x 800 or higher/16.7 million colors or more
Other You'll need Internet connectivity to activate this software.
System Requirements (Windows®)
Operating System Microsoft(R) Windows(R) 7 SP1
Microsoft(R) Windows(R) 8.1
Microsoft(R) Windows(R) 10
This does not work with the Windows(R) RT.
This does not work with the Windows(R) Phone.
This does not work on the virtual machines such as Hyper-V, Virtual PC, or Boot Camp.
Host Application VST instruments (VSTi) version: VST 2.4/3.6 compatible
CPU Intel(R) Core(TM) i5 or better
RAM 2 GB or more
Hard Disk 100 MB or more
Display/Colors 1280 x 800 or higher/24 bit Full Color or more
Other You'll need Internet connectivity to authorize this software.
You'll need Adobe Reader (available free of charge) in order to read the online help.
Microsoft Windows is a registered trademark of Microsoft Corporation in the United States and/or other countries.
VST is a trademark and software of Steinberg Media Technologies GmbH.