Hmm, I've never seen a 'white label' one. From the look of it, it's no cheaper than a genuine one, so I suspect that it is original H/W.
Glad you've got it working as advertised, and on a Macbook.
The scope probe X1 / X10 thing is common to all scopes and all switchable scope probes. Basically, in X1, the probe tip exhibits the full capacitance of the probe cable plus the input capacitance of the scope (probably about 100pF in total) and the scope 1M ohm input resistance. This limits the useable bandwidth of the probe to very low frequencies, certainly not above audio - depending on the source impedance.
In the X10 position, the probe is configured as a 10M Ohm high impedance voltage divider, 9M Ohms in the probe tip (plus a bit of capacitance) combined with the 1M ohm input resistance of the scope. The Input capacitance at the probe tip is reduced by approximately the same ratio (around 10-15pF), making it suitable for high frequency use with minimal circuit loading.
Do a forum search of variations of 'scope probe switchable, X1,X10' etc. and you will get loads of hits. It's a fairly common question.
The X1 position is pretty useless unless you need a bit of extra low frequency sensitivity, but you could just as easily use a BNC clip lead and get the same performance. It is best practice to keep the probes switched to X10 (there is a probe division menu in the scope s/w [EDIT: Channel Menu, Probe Rate] so that all the readings come out correctly), for the reason above, and to provide additional useful protection to the scope inputs. The switches tend to be a reliability liability too, I don't know why switchable probes are so common (you can get dedicated X10 probes... and X100 probes for high voltage or low loading use).
Don't forget to adjust the probe compensation trimmers to give a proper square wave on the X10 setting, using the scope Cal output, before using them in anger. That should be documented in the manual too.