My Photo Stream Folder is Missing in Photos app in Mohave

The images from the iPhone ARE in the "Photos" folder but where is the My Photo Stream folder?

Did you perhaps enable iCloud Photos in the Photos > Preferences > iCloud?

If iCloud Photos is enabled, the My Photo Stream album will not be shown.

Same problem here and I too do NOT use iCloud Photo Library. I'm using OS 10.13.6. I had done nothing different... the old Photostream 'album' just disappeared from my laptop's Photos program sometime in the last couple weeks. Photostream still exists like normal on my iPhone. As an infrequent Photos user, I'm really careful to not touch/alter any files or settings as I don't want my pictures to disappear

My fix: in the laptop's Photos/Preferences/General/Library Location I clicked 'Use as System Photo Library'. The indicated file (username/Pictures/Photos Library) is the default name/location. But somehow Photos 'lost' its connection with that default file. At any rate my Photostream pics from the iPhone now show up on the laptop just like they used to. Whew. Thought I'd lost my Christmas shots :)

You could check in a different user account, if My Photo Stream is working at all with your current iCloud Apple ID. Create a new user account, log in, create a new Photos Library for testing, enable iCloud with My Photo Stream in the System Preferences and in the Photos Preferences.

Does My Photo Stream appear in this new account? https://support.apple.com/en-us/HT204443

This will tell you, if your current user account has problems, that will prevent My Photo Stream from showing.

Does this mean I would add a new user account on the iMac? (with a new Apple ID?)

A new user account, just for testing. You can delete it afterwards. That will give you a pristine, new home folder. Do not change any preference settings, do not launch any third-party applications. But sign into iCloud with the same AppleID that you are using on your iPhone and iPad for My Photo Stream.

Then launch Photos to check, if you can see My Photo Stream for your current AppleID. With a new AppleID it is no longer possible at all to use My Photo Stream. That would be futile. But since it worked for your AppleiD previously, something else must be wrong. My iCloud AppleID is working, when I use a new user account and enable nothing but My Photo Stream.

In the Photos app iCloud sharing is not enabled but Photostream is.

Which preference do you mean by "iCloud Sharing"?

• "Shared Album" would not matter
• But "iCloud Photos" must not be enabled, if you want to see My Photo Stream.

What is enabled in the System Preferences > iCloud? Is My Photo Stream enabled in the System Preferences < iCloud?

My Photo Stream is apparently about to be discontinued. If you recently created a new Apple ID "My Photo Stream" is no longer available. You are not by any chance using a new AppleID?

In Photos 4.0 the albums section in the sidebar has been rearranged. Have you looked in the Shared section of the sidebar?

Where is your Photos Library stored? Is it on an external drive? Or in your Pictures folder?

Younger right , Mike. I created a new user account with a small test Photos Library and enabled My Photo Stream for this Library, using my current iCloud AppleID.

And My Photo Stream appeared immediately under Library, not "Albums" as the user guide states.

For that user account only "My Photo stream is enabled, no other cloud services.

So My Photo Steam is working for your AppleID in a new user account, but in your regular user account it is not shown. Your regular user account is behaving as if iCloud Photos were enabled.

Have you tried any fixes on your Home Folder? Fix the permissions in your home folder?

https://support.apple.com/en-us/HT203538

And now I just took some photos on my iPhone in the same room as the iMac. They are not in Photo Stream on the phone, and they are not in the main Photos folder on the iMac.

Is the file format of the photos compatible with My Photo Stream? JPEgs, not HEIC?