What is the compatibility of BigKeys LX?
BigKeys LX is compatible with both Windows and Mac computers. BIGkeys LX uses a USB-A cable to connect to your computer. You may need a USB adapter to connect the keyboard to recent models of Mac computers that use USB-C.

How do I remove the keys in order to rearrange them for ABC or QWERTY layout?
Position a small, flat object underneath a key and lift up. You should easily be able to lift the keycap off of the key switch. You can then remove the remaining keys and reattach them to the correct location on the keyboard.