Hello Bob,
Unfortunately this incompatibility is caused by the real time scanner of Intego (and other Mac virus scanners) and nothing we can fix on our side. In short: The real time scanner intercepts the file operation on the Boxcryptor volume and then blocks file operations of Boxcryptor which are required to return the initial file operation on the volume. This can lead to deadlocks and an unresponsive operating system. Please contact their support for additional help.
Best regards,
Robert