MacBook with USB-C a new generation
March 9, 2015, Apple released its first MacBook without the Pro or Air monitor since it discontinued a similar model on July 19, 2011.
The new model can be identified through the Apple menu -> About This Mac -> System Report with a model identifier of MacBook 8,1 or later.
If no access exists to the operating system to boot the machine, its brand new USB-C port is quite distinctive:
The forum for the USB Type-C connector MacBooks which are from 2015 and later, is here:
USB-C is quite different from the USB-2 found on older models, shown on image below:
The USB-C model, is the first MacBook without the Pro or Air moniker to no longer have built-in support for Rosetta. This tip explains what that means:
Rosetta/PowerPC Applications and Lion and above
There is a separate forum for discussing the MacBook that has USB 2 and earlier here: