(I reported this by email on Tuesday, but haven't received a response, so perhaps that was the wrong support channel and it is more appropriately reported here.)
1. I purchased Logos 4 on Monday, and now have everything installed, downloaded and indexed on my Mac (first using the latest Beta 5, and just now with Beta 6), and also in a Windows virtual machine.
Prior to purchasing Logos 4, I already had the Theological Journal Library vols. 1-10 from Galaxie Software on Windows, and they too have been downloaded in Logos 4. However, although it is present in my Windows installation, I notice that the ‘Journal for Biblical Manhood and Womanhood Volume 10’ from the TJL is missing from my Mac installation.
First, a Windows screenshot, showing that JBMW vol. 10 is present:

And now the Mac, where it isn’t:
Any ideas? I guess it is possible that the Windows Logos 4 installation picked up the ‘Journal for Biblical Manhood and Womanhood Volume 10’ from my prior Libronix 3 install that was present in my Windows virtual machine, perhaps?
2. More generally, I notice that I have 2178 resources in my Mac library, but 2182 in my Windows one. So perhaps JBMW vol. 10 isn't the only thing missing on the Mac...
3. I also observe that on the Mac, but not on Windows, vol. 8 of the Chafer Theological Seminary Journal is named inconsistently from all of the other volumes, since it is missing the word ‘Journal‘ from its title:

Many thanks in advance.