There is no official native port of Notepad++ to the Mac. However, I believe there are some here who have used the Notepad++ on a Mac before, probably using something like Wine (which is a tool for running Win32 applications on Linux, but since Mac is built on Linux, I believe I’ve heard Wine works on Macs, too). So the best I could say is, “try installing Wine for Mac, then install Notepad++ using Wine”. Unfortunately, I don’t have access to those environments or tools, so I cannot give you more than that.