thanks for taking time and checking my issue. I really appreciate the hard work being done to provide complex tools readily available.
After doing additional reading following the creation my posting above, I came to the same conclusion: my installation is far too old and a new installation is strongly advised.
I tried to follow the Bitnami Redmine upgrade instructions but ran into several problems even before doing the steps:
1) the whole Redmine instruction page jumps - in some sections - back and forth between the OS X installer version (the old method) and the OS VM version (the new method). But as of now, a Redmine package for OS X is only available as VM, not as an installer.
2) The upgrade instruction section does not take into account that files have been saved as attachements to Redmine tickets. Therefore the "files" folder from the htdocs folder has to be copied manually to the new installation besides doing the MySQL database dump. This was confirmed in another community posting but not in the instructions.
3) The new OS X VM approach isolates the Redmine stack totally from the surrounding OS X, file wise and IP wise. I appreciate that no more lib issues may arise from this move. But now all my knowledge aquired regarding all the file path on localhost is useless as the Bitnami app folder is mounted as NFS volume, which itself separates logically from the surrounding Debian as part of the VM, but this is only visible for the OS X Terminal user who fiddles around with PWD and LS. And copying the MySQL database dump requires a writeable folder which is also not specified. In the end I have choosen the htdocs folder which was fine after CDing myself there for the import command.
The import itself ran fine with no errors, all instructions were accurate and understandable. My customised Redmine Login paged appeared and I was very pleased to see it again after a long time.
But now I am facing the next issue: my Redmine user credentials are no longer accepted by the system. Also written down in a TXT file there should be no uncertainty about what to enter. Ok, in general I open PhpMyAdmin and open the user table to fix this. As the old localhost address from the installer version is no longer available (see #3) there is a hard coded link to instructions on the Redmine Login page pointing to this URL:
Sorry, I cannot work with instructions from a 404 page. I tried to find a better page and ended here:
ssh -N -L 8888:127.0.0.1:80 bitnami@THE_CURRENT_IP
Permission denied (publickey).
And thanks for reading that much - but I always want things to be fixed if they are broken, and the OS X sections need some inspection.
Regards from Berlin, Germany