Lately I have been receiving photos that have no color profile listed when I open them for viewing. I know that all of the photos in the gallery have a color profile of srgb and when you open them on your computer; you have the choice of staying in that color space or going with your working color space. If your color setting is already set to srgb, you will not get a warning box. In my case it is set to open in Adobe RGB and I will work in that color space until time to upload back. When a photo returns with no color profile; I'm wondering if the box that says: Discard the embedded profile (don't color manage)," is getting checked? If you check that one, it will have you flying blind as far as a color space.This pop up is fine, but what I am getting is a warning box that there is no color profile!
In Photoshop under Edit>Color Settings is a place where you decide how you want your photo to open up and what color space you want to work in. You can have several different variations, especially if you are downloading images to an outside printer. The place I use specifies exactly how they want the color settings and with them I have the choice of using Adobe RGB instead of srgb. I set my color settings to their specifications and then give it a name so that I can have the right color settings. Here is a general setting for srgb, which you can vary the settings.
When I get ready to upload back and if I am in any color space other than srgb, then I do a "Convert to Profile (under Edit). Now the photo is ready to go.