The MacPlus’ databases (mainly spip and phpbb) were converted from the ISAM format to the new MyISAM format.

Despite it doesn’t give great enhancement on the rapidity this will bring native cross-os compatibilty of the databases files and will permit online reparation and backup of the databases.

Command to be used for the online conversion is:
ALTER TABLE nomdetable TYPE = MYISAM;

See Online: MySQL Documentation.