The USB 3.0 ports on my mid-2014 Macbook Pro Retina seem to run at USB 2.0 speeds maximum. A USB 3.0 memory stick connected through one of these ports shows as running at USB 2.0 speed (With further testing, the USB 3.0 memory stick is actually running at only ~340 Mbps). I have a few other peripherals connected but these seem to also run at 2.0 or even 1.1 speed.
I've tried unplugging all devices, then plugging only the 3.0 device in - no difference.
What is going on?
- Model Name: MacBook Pro
- Model Identifier: MacBookPro11,3
- Host Controller Driver: AppleUSBXHCILPTH
- Operating System: MacOS Mojave 10.14.6
Searching 'AppleUSBXHCILPTH' brought up a similar query, but the user there was only concerned about seeing USB 1.1 speeds for the Apple Internal Keyboard/Trackpad; they didn't check USB 3.0 functionality.