OS X 10.10.3 was dropped by Apple earlier on in the week, and the stand-out feature of this latest release is easily the new Photos app. The successor to iPhoto and Aperture, Photos has been a year in the making, and the general reaction to this new implementation appears to be one of positivity. But where OS X 10.10.3 giveth, it also taketh away, and along with the shiny new app, you may have also noticed a slow-down in boot times after installing on your MacBook. Here, we guide you through a quick and easy fix.