Hello Jean and thank you for your answer. I understand that it must be complicated to understand what I want to explain, so much I find it difficult to explain things that are beyond my understanding. Let's try briefly, knowing that I am to my great regret quite ignorant in terms of computer language:
On my machine I use Frescobaldi 3.0 (which works pretty well and suits my needs perfectly except “convert.ly" and “musicxml2ly" which don't work beyond lilypond 2.20.). Upgrading to 3.1 is impossible (issue: Crash: "Could not find QtWebEngineProcess" #1244 on Frescobaldi's site, unresolved). The main 3.0 infos are: Python: 3.7.0 - python-ly: 0.9.5 - Qt: 5.11.1 - PyQt: 5.11.2 - sip: 4.19.12 - poppler: 0.57.0 - python-poppler-qt: 0.24.2. Now about Fresco 3.2: the procedure given in the “install" file does not work and returns messages like "/Library/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python: can't open file 'setup.py': [Errno 2] No such file or directory – heroes:~ thiryjeanlouis$ python3 setup.py install —user /Library/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python: can't open file 'setup.py': [Errno 2] No such file or directory" etc. etc. If I type "frescobaldi" in the terminal, I get an app called "Python" exactly similar to Frescobaldi, using the same preferences and the same sessions but which is not version 3.2 and whose info is: Frescobaldi: 2.20.0 (!!) - Python: 3.5.9 - python-ly: 0.9.5 - Qty: 4.8.7 - PyQt: 4.12.1 - sip: 4.19.20 - poppler: 0.61.1 - python- poppler-qt: 0.24.0. A detail however, the application crashes systematically when leaving. We can assume that there is a sneaky Python too many somewhere in the system, it's possible but where does this Frescobaldi 2.20 come from? Hello Jean and thank you for your answer. I understand that it must be complicated to understand what I want to explain, so much I find it difficult to explain things that are beyond my understanding. Let's briefly try: On my machine I use Frescobaldi 3.0 (which works pretty well except convert.ly and musicxml2ly which don't work beyond lilypond 2.20.). Upgrading to 3.1 does not work (issue: Crash: "Could not find QtWebEngineProcess" #1244 on Frescobaldi's site, unresolved). The main 3.0 infos are: Python: 3.7.0 - python-ly: 0.9.5 - Qt: 5.11.1 - PyQt: 5.11.2 - sip: 4.19.12 - poppler: 0.57.0 - python-poppler-qt: 0.24.2. Now Fresco 3.2: the procedure given in the "install" file does not work and returns messages like: "/Library/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python: can't open file 'setup.py': [Errno 2] No such file or directory heroes:~ thiryjeanlouis$ python3 setup.py install --user /Library/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python: can't open file 'setup.py': [Errno 2] No such file or directory" etc. etc. If I type "frescobaldi" in the terminal, I get an app called "Python" exactly similar to Frescobaldi, using the same preferences and the same sessions but which is not version 3.2 and whose info is: Frescobaldi: 2.20.0 (!!) - Python: 3.5.9 - python-ly: 0.9.5 - Qty: 4.8.7 - PyQt: 4.12.1 - sip: 4.19.20 - poppler: 0.61.1 - python- poppler-qt: 0.24.0. A detail however, the application crashes systematically when leaving. I found all these pythons in my Mac: Python: 3.7.6, 2.7.16 , 3.7.4, 3.5.9, 3.7.1 - Python Launcher: 3.7.6, 3.7.1, 3.7.4. We can assume that there is a sneaky Python too many somewhere in the system it's possible but where does this Frescobaldi 2.20 come from? All the best, JL Jean Louis Thiry 06 68 80 64 50 thir...@ramierou.eu 390A rue du Ramiérou à Montauban