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I did not re-install TeX or MacTeX on the new computer, I just assumed that it would transfer like the other software on the old computer did. Where can I install TeX or MacTeX, and which would you recommend?

Thanks!

I recently got a new computer (mac, using texshop), and after transferring all of my files, none of them would open, always displaying this error:

! LaTeX Error: File 'article.cls' not found.

The same error appears for all types of document class. After a bit of initial searching, it seemed as ...