Hi there was a problem with the original version of Jaikoz 4.5.1 for OSX, the execute permissions hadnt been set preventing the calculation of Acoustid Fingerprints, this in turn would make matching sub-optimal.
To fix this either use the following workaround:
Open /Utilities/Terminal
chmod 777 /Applications/Jaikoz.app/Contents/Resources/Java/*
Or download Jaikoz for OSX again, go to the About section to ensured you did not redownload a cached version, you should see the build date as 12th November instead of 9th November