How can I see My Photo Stream from two Macs associated with the same Apple ID?

What versions of iPhoto are on these machines?

Do you have more than one iPhtoo library on your Mac? iCloud is only associated with one library - it sounds like you have more than one and iCloud is associated with a different one that your current default library - if log out of iCloud in the system preferences, switch to the library you want to use and log back into iCloud in the system preferences and to your Photo stream in the iPhtoo preferences

LN

On the MBP turn PS off in the iPhoto preferences and then log out in the system preferences - restart the MBP and tehn log log back in and turn PS on

And be sure that the MBP and the source device are both n WiFi

LN

Any help here - http://support.apple.com/kb/HT4486?viewlocale=en_US&locale=en_US - not the trouble shooting links at the bottom

LN

Since the library on the MBP is empty turn PS off in iPhoto and log out of iCLoud - trash the empty iPhoto library - restart yoru MBP and l;aunch iPhoto reating a new library - import one photo inot it to verify things are working and then log into iCLoud and turn on PS - maybe this will kick start things

LN

see if any of the FAQs or trouble shooting links here help - http://support.apple.com/kb/HT4486?viewlocale=en_US&locale=en_US

LN

I found out about this issue when I created a new library with some photo's I wanted to sync to my iCloud account. I found the following on the Fat Cat Software page and thought it might be helpful to others:

Using Photo Stream with multiple libraries

Starting in iPhoto 9.2, Apple introduced a new feature called Photo Stream, which lets you automatically transfer photos via their iCloud service between your iPhoto library and your other devices such as an iPhone, iPad, or another Mac. This feature works when you have multiple iPhoto libraries set up, but there are a couple things to be aware of.

First, iPhoto will only allow Photo Stream to be active in one iPhoto library at any given time. If you've already enabled Photo Stream in one library, but then open a second library and enable Photo Stream there, this will cause Photo Stream to be turned off in the first library.

Any photos downloaded by Photo Stream are actually stored in an entirely separate location from any of your iPhoto libraries. This means that, even if you do switch Photo Stream from one library to another, you will not need to go through redownloading all the photos you already have in Photo Stream back from the iCloud servers. So, switching Photo Stream from one library to another is a relatively inexpensive operation, so you can do it as often as needed without it being much of a hassle.

Do both Macs use the same user name for you account on them and have the same Mac name under Sharing?

I saw the same error message, finding this discussion after a bit of Googling. My story is similar: My ~40GB iPhoto library was moved (exact file copy) from my old 2009 Macbook Pro to a brand new 2014 rMBP. Both computers are signed in to the same iCloud account, both computers have the exact same login username. iPhoto and iCloud work just fine on the new computer with the old library. Working on my old Macbook, I decided to create a Photo Stream-only library so that I could still access my pictures. When I went to enable it, I got the same error message as the original post. Deciding to take a slight risk (as I had my photo stream already fully imported), I clicked "continue" to enable Photo Stream anyway. To my surprise, it worked. Both macbooks plus my iPhone can add to and delete from the photo stream, with the results being shown on the other two devices within seconds.

I think that it should work with only the click through, but in case that's not the 100% solution, here's everything I tried (in order) up through the "continue" on the error message. For simplification {TEST} will represent relaunching iPhoto on the old computer (the iCloud-only one) and trying to enable Photo Stream, but usually stopping at the error message and clicking "cancel".

• Disable and reenable iCloud Sharing on the new computer; {TEST}
• Disable and reenable iCloud Sharing in System Preferences on the old Macbook; {TEST}
• Rename my iPhoto library from "iPhoto Library.photolibrary" to "iPhoto Library @ [hostname].photolibrary"
• (this one gets a bit technical at the end) Open "Pictures/[iPhoto Library]/iLifeShared/AlbumData2.xml" and change the <string>...</string> under <key>Archive Path</key> to match the updated iPhoto Library name. For me, it was line 7. If you're not comfortable with XML/PLIST/HTML, you may want to find someone who is for this edit.
• {TEST}
• Then I gave up and clicked "continue"

If just clicking through doesn't work, my best bet for what actually fixed it was changing the iPhoto Library path.