I just downloaded atlassian-confluence-7.4.1-x64.bin from the Atlassian site to install on my Mac.
When I double-click on this, it unpacks into atlassian-confluence-7.4.1-x64.bin.cpgz.
When I double-click that, it unpacks into atlassian-confluence-7.4.1-x64 2.bin
When I double-click that, it unpacks into atlassian-confluence-7.4.1-x64 2.bin.cpgz.
I am sure I can keep doing this until the cows come home or a wormhole opens or I am running out of space on my SSD, whatever happens first. But, at some point, I would like to be able to actually have a Confluence installer to run, and there are also more entertaining ways to waste my time, so I would be thankful if you could point out to me what is happening here?