# When clicking on 'typeset', preview does not appear

I'm using TexShop 4.24 and pdfTeX on macOS 10.14.3

In the past, when i click on 'typeset', or Command T, a preview window of the pdf pops up. However, recently when clicking on 'typeset', i get the pop up to save the file as a pdf.

If i open my old files, the 'typeset' button works to open a preview. New files face the issue above though.

• I'm not sure since I don't use it but maybe your file has no .tex extension. – Sigur Feb 16 at 17:17
• Does the pdf actually get generated? Try a really basic document: \documentclass{article} \begin{document} Hello World. \end{document}. – Peter Grill Feb 16 at 23:51