Where was Mackintosh and T.J. filmed?
1975 film by Marvin J. Chomsky
Mackintosh and T.J. (1975) was filmed in Lubbock, Guthrie and 6666 Ranch, 3 places named in its Wikipedia article, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's article
The Wikipedia article names 3 places. Each links to the sentence that says so.

