I dont understand how to read "Supported Models"?

Noob here,

Im trying to understand the "Supported Models" page; i have one Macbook Pro 5,5 and one Macbook Pro 11,2.

Reading the list it says under "Tagged Issues":

Macbook Pro 5,5:

non-Metal GPU (macOS 11+)(opens new window)

USB 1.1 (macOS 13+)(opens new window)

Macbook Pro 11,2:

Legacy Metal (macOS 13+)(opens new window)

Im reading the links but i still dont understand if the computers are unsupported or if these are just minor notes?

Someone care to guide me?