Lightroom Classic - Cant import from catalog

[#1]

Hi!

I am trying to add a rather big catalog to another.

When asked to select the catalog content (see below image), I am unable to click the box on my mac? Nothing happens when I try to select a catalog content, so I cant go forward. 

Any ideas of why this is happening? 

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator}

[#2]

Hi!

I am trying to add a rather big catalog to another.

When asked to select the catalog content (see below image), I am unable to click the box on my mac? Nothing happens when I try to select a catalog content, so I cant go forward. 

Any ideas of why this is happening? 

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator}

[#3]

I think because there are No New Photos found.

Are you sure you have the correct catalog open and you are selecting the correct catalog to import From.

Kind of looks like you have selected the Same catalog that is open.