So confused on external monitor support for my Late 2013 27'

[jharvey71884]

So I'm looking to add a 4k display to my 27 inch Late 2013. If it's possible. I also am wanting to make sure it's 60GHz.

On Apple's website, this is what it says. What the heck is a SST? Been searching on the internet and must be dumb, because I'm not following.

Single-Stream (SST) displays
Most single-stream 4K displays are supported at 30Hz operation.

With OS X Yosemite v10.10.3 and later, most single-stream 4K (3840x2160) displays are supported at 60Hz operation on the following Mac computers:

• MacBook Pro (Retina, 13-inch, Early 2015) and later
• MacBook Pro (Retina, 15-inch, Mid 2014) and later
• Mac Pro (Late 2013)
• iMac (27-inch, Late 2013) and later
• MacBook Air (Early 2015)

With OS X Yosemite v10.10.3 and later, most single-stream 4K (4096x2160) displays are supported at 60Hz operation on the following Mac computers:

• MacBook Pro (15-inch, Late 2016)
• MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports)
• MacBook Pro (13-inch, Late 2016, Two Thunderbolt 3 Ports)
• Mac Pro (Late 2013)
• iMac (Retina 5K, 27-inch, Late 2014) and later

With macOS Sierra, MacBook (Retina, 12-inch, Early 2015) and later supports 4K (3840x2160) displays at 60Hz operation over DisplayPort.