Permission problems viewing PDFs in temp folders on MacOS

[hampe]

I'm trying to use tikz visualization on a MacOS 10.12.2, but Preview complains that

The file “poly15629Taaaa0005.pdf” couldn’t be opened because you don’t have permission to view it.

I can identify the temporary folder using

Code: Select all

print $ENV{TMPDIR};

in polymake (it' something long and convoluted in /var/folders). Permission are set such that reading the file should be possible. Does anyone have experience with this problem?