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a curse on OS sierra and MySQL?




I have been trying repeatedly and in vain to install the community edition of MySQL 5.7.16 on an iMac running OS sierra.  I religiously followed the instructions for uninstalling previous versions found at http://community.jaspersoft.com/wiki/uninstall-mysql-mac-os-x, and installation progresses smoothly and terminates successfully.  Bu the attempt to start the server produces the error message  :
ERROR! MySQL server PID file could not be found!

I have tried this and that, looking at advice on the Web, which is plentiful but not always. Nothing works.

I have installed Postgresql, about which I know very little. But the installation proceeded smoothly, and turning the server on and off works like a charm.

Is it a reasonable conclusion that MySQl and OS 10 just don’t like each other very much and that a prudent man is better off with some other database? The MySQL documentation is not very helpful in the sense that following it doesn’t produce good results.