[axman6]

That sounds highly unlikely, the one that came with my MBP supports everything up to Thunderbolt. But USB is ridiculously complicated, and sometimes better cables fail on shitty devices; I've seen it a few times with camera equipment where I really needed the cable that came with it because higher specced ones just didn't work.

[cjcampbell]

True if they are referring to the MagSafe cable. If referring to USB C to C, they’re mistaken. The charging cable for all MacBooks does support USB 2 data rates.

[Reason077]

The charging cables included with MacBooks do not support Thunderbolt. Just USB 2.0 data.

I do have an Apple Thunderbolt cable which supports charging (of course), but it was a separate purchase. The Thunderbolt cable looks similar but is a bit thicker, and has the Thunderbolt logo printed on the connectors at each end.