How can the mouse pointer be moved using the keyboard?

In System Preferences, choose Accessibility > Mouse & Trackpad (or search for “mouse keys”). Enabling Mouse Keys (which can usually be done by tapping Option five times) allows the numeric keypad to function as an 8-direction “joystick” (7 = left+up, 8 = up, 9 = right+up, etc.). Use the keypad's 5 to click the mouse (press it twice, quickly to double click; hold Control while pressing to right-click).

Left shift + left alt + num lock enables the number pad for directional cursor function. Use 8,9,6,3,2,1,4,7 to guide your cursor. To click an option with your cursor tap 5 and to double click tap 5 twice.