Problem: you receive the following message after inserting the Challenger EM Ultrasound disk into a Mac with OS X Lion:

'You can’t open the application Challenger EM Ultrasound (Mac OSX) because PowerPC  applications re no longer supported.'

Solution: At this time, this product's travel DVD is not compatible with Apple's new Lion OSX for Mac.  Lion users, ask about our online version. All other platforms are fully compatible (Online and DVD)