Reference
In these tutorials, keys on the numpad are prefixed with NUM while similar keys are prefixed with TOP.
Mouse input is written:
LClick — left mouse button click
RClick — right mouse button click
Wheel Click — scroll wheel click
click/drag — click button and drag
Wheel scroll — scroll with wheel
Key / mouse combinations are written: SHIFT+S, CTRL + RClick, SHIFT + LClick/drag, etc.
Keyboard/Mouse References and Macs
Blender uses a wide variety of keyboard shortcuts, mouse input, and combinations of each. After a while, they will become second nature to you, but in the tutorials, I have to make reference to them. I try to make my references as logical as possible, but I will spell them out for you here.
Numpad Keys
The keys on the Numpad (shown left) work differently than the other keys on the keyboard. For instance, the numpad "1" key does something completely different than the "1" key at the top of your keyboard. To distinguish between them I will prefix the keys on the numpad with NUM and the similar keys at the top of your keyboard with TOP.
Because Blender uses the Numpad keys, you NEED a keyboard with a seperate numpad. Laptop keyboards typically have their numpads as secondaries to the letter keys on the right. It's a major pain to use Blender with this key setup, so if you're using a laptop, I recommend connecting a seperate keyboard or a USB numpad of you have one.
Mouse Input
Blender makes heavy use of Left and Right mouse buttons and the Scroll Wheel. For this reason I recommend having a mouse with all three. If you have a single-button Mac mouse, you might want to go to Wal-Mart and pick up a cheap mouse.
In these tutorials I will refer to a few different sorts of mouse input.
Clicking the Left mouse button will be referred to as LClick. Clicking the Right mouse button will be referred to as RClick. Pretty simple, but you also have the scroll wheel, which can also be clicked. Clicking the scroll wheel will be referred to as WheelClick.
Click/Drag refers to holding down one of the mouse buttons (or wheel) while moving the mouse.
WheelScroll is self-explanitory, I hope.
Combinations
Any key / mouse input combinations will have + inbetween the different parts.
CTRL+NUM7, or
SHIFT+LClick/Drag, etc.
Macs
I don't have a ton of experience using Blender on Macs, but the only differences I've found so far are things that are unrelated to making sculpties.