It doesn't happen every time, but occasionally when I try to install a mod (particularly a NPC mod or banter pack), I get an error command saying I don't have appropriate access privileges. I try to change them but nothing seems to work. I'm using a 2012 MacBook Pro with Yosemite 10.10.1 and all other mods seem to work. The error message reads, specifically:

"The file [whatever the command file is] could not be executed because you do not have appropriate access privileges. To view or change access privileges, select the file in the Finder and chose File>Get Info."

I do so, changing "read only" to "read & write" wherever I can and making the computer completely accessible, but I still get the same error. Not a hanging matter, of course, but any and all help would be most appreciated. Thanks.

Set the 'execute' flag on the setup file:

chmod u+x <FILENAME>

Could you go into a bit more detail, please? Would this be in the terminal window that opens when I click the command file? Thanks.

You need to use a separate terminal (not the terminal that opens when you click on it). In a Finder window click on 'Applications' >> 'Utilities' >> 'Terminal'. The chmod function sets the file permission bits of the specified file, in your case giving <FILENAME> executable status.

NB: I am relaying this information via a friend, as I personally have no knowledge of Macs.

Doesn't seem to have done any good. In any event, I appreciate your assistance. I'll look some more here and there. Take it easy.

Sorry to hear that. In a case like this, where only specific mods are affected, you'd be better off posting your question in the community forum where the mod is hosted.

That is the next step, indeed. Regardless, thanks again for all your help.