Not familiar with Mac OS at all. In Windows, new IE 11 in Windows 8 will allow native Netflix playback to all SuperHD resolution. So are the Windows 8 Netflix app. However, on Win7 or earlier, you will also be capped at 720p @ 3000kbps. IE 11 in Windows 8 added copy-protection support. That's why it allows SuperHD resolution.On iPAD, Netflix player max out @ 720x480 SD resolution as all mobile players are while my Win8 tablets can play all SuperHD resolutions easily.