it's one thing that xtradb is gone but when the server refuses to start instead just warn about no longer supported options this is *very bad* 2017-07-13 12:22:57 140560655323200 [ERROR] InnoDB: Unrecognized value ALL_O_DIRECT for innodb_flush_method 2017-07-13 12:22:57 140560655323200 [Note] InnoDB: Number of pools: 1 2017-07-13 12:22:57 140560655323200 [Note] InnoDB: Using SSE2 crc32 instructions 2017-07-13 12:22:57 140560655323200 [ERROR] InnoDB: Plugin initialization aborted with error Generic error 2017-07-13 12:22:57 140560655323200 [Note] InnoDB: Starting shutdown... 2017-07-13 12:22:57 140560655323200 [ERROR] Plugin 'InnoDB' init function returned error. 2017-07-13 12:22:57 140560655323200 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 2017-07-13 12:22:57 140560655323200 [ERROR] Unknown/unsupported storage engine: innodb _______________________________ BTW: "InnoDB: Cannot open '/Volumes/dune/mysql_dbmail/ib_buffer_pool' for reading: No such file or directory" - who cares when "innodb_buffer_pool_dump_at_shutdown = 0" is set on purpose because writing some GB buffer_pool at shutdown takes longer than the whole reboot of a typical server these days