Full list of save options no longer appears
I am trying to save a tiff file as an ordinary JPG, but the full list of file types no longer appears. What do I do?

I am trying to save a tiff file as an ordinary JPG, but the full list of file types no longer appears. What do I do?

"Save As" now lists only the formats that support all the current properties of the file. All other formats, with limited support, are now moved to "Save A Copy".
This had to be changed because Apple removed the API that allowed Photoshop to strip "-copy" from the filename. With the new API, Photoshop is forced to finalize the filename before entering the Save dialog. That filename has to contain "-copy", because it is a copy. If it wasn't a copy, your original file would have to be overwritten as a flat 8 bit file to satisfy the jpeg specification.
To be clear, the old Save function is no longer possible. This is not a bug or mistake, but a deliberate security policy from Apple.
Platform parity has always been important in Photoshop, for the sake of actions, plugins, tutorials and so on. So it had to be changed in the Windows version as well, even though it never was a problem on Windows. But it may well be in the future, if Microsoft adopts the same policy.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.