tried to open them up in photoshop
Which version of Photoshop? Which operating system?
The answers to your questions lie in the following links.
Camera Raw plug-in | Supported cameras
Camera Raw-compatible Adobe applications
Why doesn’t my version of Photoshop or Lightroom support my camera?
The T5i was first supported in Camera Raw 7.4 which is only compatible with Photoshop CS6 and later.