I used Particle Dev on my Mac to update my Photon. I added a space to a line to force the recompile and expected it to get the new 0.4.6 update. It blinked Magenta for quite a while, then went solid Magenta. I did some resets and it would blink green seem to connect and then breathe magenta for a long time - like over an hour. I tried doing resets over and over; no difference.
Today I decided to try the update from the Web Dev with a blink program. That had a number of magenta blinking patterns and eventually my Photon came up. I could then go back to Particle Dev and push my own firmware down to the Photon.
For some reason the update via the Particle Dev environment didn’t get the job done.