Please quote the complete exact word-for-word verbatim error message.
Also please state the exact version of Lightroom and the exact version of your operating system.
vOS X 10.9.4 (13E28)
Error message “The application ‘Adobe Photoshop Lightroom 5’ can’t be opened -1712
I’m thinking this might be an apple problem?
Thank you!! You got it spot on—much appreciated—Julie