Hi Jacques, Sorry to be repetitive. What OS are you running?
On 10.11.6 El Capitan, this is the scenario: sudo dtruss lilypond --version Password: dtrace: failed to execute lilypond: dtrace cannot control executables signed with restricted entitlements It all about this hard to understand ‘rootless’ system that Apple have introduced. It seems you have to adjust things with csrutil, but I cannot get that to work. Andrew On 4 September 2016 at 11:39:19 PM, Jacques Menu Muzhic ( imj-muz...@bluewin.ch) wrote: Hello Andrew, Here is what I got spying a running Frescobaldi instance when I closed an open file: menu@macbookprojm:~/Documents/LaTeX/PartitionsLilypond > sudo dtruss -p 1273
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