I have tried to install Elementary OS Freya using a USB drive on my MacBook Pro (Retina, 13-inch, Early 2015) but the laptop doesn't recognize the bootable USB.
Many times I thought it could the the drive, so I use another ones, and re-made several times the image with no luck. Non the laptop or the Startup Disk utility found the drive as bootable.
Today, I just tested the same USB Drive on another Early 2015 and on a Late 2013.
For my surprise, the USB drive is ok and is working "fine" on the Late 2013, but it didn't work on the another Early 2015.
What's going on with those models?
Also, as you may have noticed, I wrote fine whiting quotes, this is because when I booted the OS the UI was completely broken (looking huge) so i couldn't even use the OS on the Late 2013.
Is the development team aware of this issues?