An example of Mac full install. This option is no longer available. Only the USB download is available which works on Mac

1.  I used Safari to download the most current NMCollectorJEforMac.zip (no longer available) 2.  Here is a picture of the file as it is downloading.
Downloading

3.  Here is a picture of the completed download.  At this point I clicked the little magnifying glass icon that says "Show in folder" when you hover your mouse over it. 
Downloaded

4. This opened the downloads directory on my Mac.  You can see that the NMCollectorJE6 folder was automatically extracted from the NMCollectorJEforMac.zip.
Opened

5.  Here I dragged and dropped the downloaded
NMCollectorJE6 folder to my desktop.
Desktop

6.  I then opened it up and located the nmCollectorJE.app file.  Double clicking this starts the application but first a warning is displayed that this application was downloaded from the internet.  I clicked OK to run it.
Warning