That may be the problem if you have a certain version. Can you revert to a previous version?
Originally Posted by keithjfuller
According to Gearwire:
"...something appears to be amiss with Apple's most recent OSX software upgrade, 10.4.9. Plugin maker Ohm Force sent the following to Gearwire...)
Important Note Caution: the installation of 10.4.9 can empcher the operation of our plug-ins AudioUnits. 10.4.9 installs a new version of auval, with which our plug-ins WITH is incompatible. We did not think that this version would be publi?e before the exit of 10.5 We wish to put a new version? day which will pass the validation within 3 weeks. Meanwhile, we advise you not to install 10.4.9. D
While it could be made clearer, it seems that Ohm Force is advising users to not apply the 10.4.9 upgrade specifically due to changes in the AU subsystem.