If the terminal graphic already have check mark next to the pin name, then you don’t need to select them. I believe you are selecting the connector#terminal and renaming them to connector#pin. I also don’t know why you are exporting the part then unzipping them…
Fritzing 101:
Instead of exporting and unzipping… that is not necessary. Go the your Fritzing My Parts (not Fritzing Core)… I don’t know where it is in the Mac on the latest Fritzing update… but, it should look something like this to find your .fzp files /Fritzing/parts/user/???.fzp. To find your schematic, breadboard, pcb, and icon, /Fritzing/parts/svg/user/schematic (etc.)/???.svg. These are the same files that you exported then unzipped. Use your .xml editor to view these files instead of export and unzipping.
The .fzp is the file that points to your .svg’s and layers for your schematic, breadboard, and pcb views. It also contains the info for you metadata and connectors that you see in the Parts Editior. Each connector has three views, each view shows the layer that corresponds with the layer in your .svg and the element(s) that corresponds with the elements(s) in the .svg.
i.e. In the schematicView, (layer=“schematic” svgId=“connector0pin” terminalId=“connector0terminal”); svgId=“connector0pin” is what you are selecting in the terminal graphic, and is a required element… terminalId="connector0terminal, is not a necessary element and you will find some .fzp’s that do not have them in the view… but it works a whole lot better when you do have them… The way it works: If you have the pin only in the .svg and not terminal, when you select the pin the wire will connect the the center of the pin… If you that pin and a terminal, then when you drag a wire to the pin, instead of connecting to the center it will jump to the terminal at the end of the pin.
The svgId and the terminalId in the .svg should be the exactly the same as it is in the .fzp… If the svgId in the .svg and the .fzp are the same, then the pin in the Parts Editor, terminal graphic should have a check… if not the same, there will be no check mark… When you select the pin in the terminal graphic, the Parts Editor will change the ID name in the .svg to match the name in the .fzp… In other words, if it is checked and it is correct… do not change it.
I never use the the select terminal graphic, I always label the .svg’s to match the .fzp. I also manually edit the .fzp… this gives me a lot more flexibility.