MacOS – What keyboard command can be used to move the cursor to the end of the next word on the Mac

Here's how you can get ⌃ Control+arrow keys to work like you describe. Copy the following property list into ~/Library/KeyBindings/DefaultKeyBinding.dict (you can create the directory if it doesn't already exist):

{
    "^\UF703" = ("moveWordForward:", "moveWordForward:", "moveWordBackward:");
    "^$\UF703" = ("moveWordForwardAndModifySelection:", "moveWordForwardAndModifySelection:", "moveWordBackwardAndModifySelection:");
}

This will set up ⌃ Control+arrow to navigate to the beginning of the next word (by using OS X's normal navigation three times: to the end of the current word, end of the next word, then back to the beginning of the next word). I also included a version that works with ⇧ Shift so you can select text as you go.

Caveat: this will only work in Cocoa apps, but I think the normal ⌥ Option+arrow navigation does too. Also, make sure to relaunch your apps!

This has been covered in a screencast on the Ask Different Blog. I encourage you to watch the video, but I'll summarize here.

First, create a little AppleScript that presses the two keyboard shortcuts. Open AppleScript Editor (in /Applications/Utilities) and paste this in:

tell application "System Events"
    key code 123 using option down
    key code 124 using {shift down, option down}
end tell

Save that as a script in ~/Library/Scripts (create the folder if it doesn't already exist).

Now, install the app FastScripts. It's free for up to 10 scripts.
Open the FastScripts preferences, find your Select Word script, and assign a keyboard shortcut to it.

Now you can press your chosen shortcut in any app and the current word will be selected.