I'm sorry that you're having an issue with this. You are correct, they should be showing the same licensed assets. You say they are using the same Software Versions. Can you tell me what versions those are? Both the versions of the Apps (Photoshop, InDesign) as well as the version of CC Desktop you are using and the versions of the CC Library panels. You can find the library panel versions if you click on the menu icon (the three stacked lines) on the upper right hand corner of the Library panel. In there you should see which version of the panel you have. Also can I get the OS versions for your Macbook and IMac?
Also, another thing you might try as a workaround is to click on the assets that show as unlicensed in your Macbook and license them again. I know, you don't want to pay for them again, and you shouldn't have to. If your account shows them as licensed in your license history then it may go through the licensing process but should not charge you again. I would suggest trying this with one and see if it does deduct a credit or license from your account. It should not. If it does, we will, of course, make that right for you and get you another credit.
But I would like to track down why they are behaving like this. Another thing you can do is to collect the logs for the apps with the Adobe Log collector. If you could collect the logs for both machines using the tool, that would be great and then send them over to us. Also please note the Adobe stock image id from one of the assets that shows as unlicensed that should be licensed when you do this to see if we can track why. You can find the image id by hovering over the image and the info screen should pop up, or by looking in your license history.
Thanks for your help and patience in tracking this down for you.
Jay I