Apple’s latest desktop operating system, OS X 10.11 (also known as El Capitan) was officially launched a couple of days ago, bringing exciting new features such as the new system-wide San Francisco font, full screen split view and Safari 9. However, us music types would be well advised to avoid upgrading for the moment, as it would appear that this particular upgrade is causing more than the usual number of compatibility issues for third-party audio plug-in developers.
Reports are flying all over the web that plug-ins from heavyweight manufacturers such as Native Instruments, Arturia, and Waves are failing validation when used with Logic Pro X on El Capitan, with Waves advising users not to upgrade until compatibility can be confirmed. Hopefully this should take days rather than weeks, but if you run any non-Apple plugins on your system, make sure you check compatibility before you take the plunge.