Created on: October 19, 2013
Last updated: April 9, 2020
If you are using an ExpressCard/34 adapter with USB ports, please see the list below to get an idea of which legacy MacBook Pro models can (theoretically) support full USB 3.0 speeds.
PCIe 1.0 1x (theoretical 250MB/s) effectively half-speed
PCIe 2.0 1x (theoretical 500MB/s) effectively full-speed
MacBookPro8,3 (both models - Early 2011 and Late 2011)