Three year update: I'm still using this keyboard interchangeably with two MacBook Pros (2011 and 2017) and occasionally with my iPhone. Still works great. Holds a charge even when I don't turn if off and forget where I've left it for a month. I velcro'd it to 1/8" luan plywood, with a gel wrist rest. On the right side I have a 7"x7" area (same plywood, epoxy or urethane coating, buffed with steel wool so it's slick for using a wireless mouse. My attached mousing pad pivots closed so the whole thing fits in my day-bag. Just a terrific keyboard. Reliable. I can kick back and type with the keyboard in my lap or switch and use the new keyboard on the MacBook Pro. The distance between the keys is the same so there's no confusion.I've been having some shoulder issues lately and noticed that arm rests on my office chair, and typing on desk tops are uncomfortable or hurt. I noticed years ago that the arm rest in my car were uncomfortable.I wanted to get an ergonomic keyboard that I could use in my lap. For the Mac I didn't find any that I liked.This one has high customer reviews and it looks like the keyboard on my MacBook Pro..... The ergonomic keyboards I found had much longer movement of the keys. It was like going back in time.So I taped this one to a thin piece of plywood (9" x 18" mouse area to the right), found a tattered old wrist rest, and tried it out. Works Great! Absolutely no learning curve. I think I type at least as well using this in my lap starting this weekend as I've typed on various MacBook Pros for the past 8 years.Now when I type on the MacBook keyboard I notice it's just not comfortable. It's OK, but this is better. I really like this keyboard. They're about the same, so the difference is where the keyboard is sitting.It's also small enough, (5" x 11.5" 13 x 29 cm) that it's going in my computer bag. I'll figure out my board later.Another big plus is how easily it switches between my MacBook and my iPad. I've never before considered the iPad to be anything more than a toy. It's still a toy, but this keyboard makes it more useful. I've got other blue tooth devices that try to connect to everything at the same time and usually nothing most of the time. This absolutely works.Now Logitech, make one that splits in two so it can be more ergonomic. (Is there anyone who could cut one of these in two and solder wires to reconnect the circuit board shorts?)Update: How to turn off Caps Lock keyGo to top bar, Bluetooth symbolSelect Logitech K811 >> Open Key Board Preferences (this can aslo be reached by opening System Preferences, selecting Keyboard)In the Keyboard window, select the Modifier Keys button (bottom right)When this pops up at the top there's a button: Select Keyboard (the default is the computer's) click on this button and select Logitech K811Then item Caps Lock Key, click on the button and choose menu item Do Nothing. Then OK, and close. That's it.Now the Caps Lock key does nothing, it won't even light up.Hope this helps. I personally loathe the caps lock key, I'd rather have an inverted thumbtack glued in its place. I've pried them off, hot glued them.Some manufacturers do not have this feature or knowledge. I added this because I sent another keyboard back because either it lacked this feature or I couldn't find it.