If you use a dark color scheme in Xcode, you have undoubtably noticed that the I-Beam is nearly invisible and that there is no setting to adjust the color of the cursor. The fix is fairly simple but it requires changing the cursor’s image file inside of the Xcode application package.
For Xcode 5, the image file is located within:
Simply open DVTIbeamCursor.tiff in your favorite photo editor and invert the colors. Restart Xcode after you are done and the new cursor should load.