Q: El Capitan and Photos

Hi rixter55,
 

Thank you for participating in the Apple Support Communities. 
 

It sounds like after updating OS X, your MacBook wakes from sleep because Photos launches unexpectedly. I'd give these steps from If your Mac doesn't sleep or wake when expected a try:
 

• Reset the SMC.
• Reset NVRAM.
• Disconnect external devices other than your Apple keyboard, mouse, and display. If that resolves the issue, gradually reconnect your devices, testing each time, until you find the device that is interfering with sleep. Then check the documentation that came with the device, or contact the device manufacturer.
• Start up in Safe Mode to see if the issue is related to non-Apple startup items, login items, or kernel extensions. 
• Try to isolate the issue by using another user account. 

Cheers.