Installed LR4 on a 2011 MacBook Air running OS10.7.4. Get message "An error occurred when attempting to change modules." on launch and unable to proceed. Any ideas please?
Ask in the LR forum. This sounds more liek a prograjm specific error, not something that can be fixed with an install or some system setting...
Mylenium
Moving this discussion to the Photoshop Lightroom forum.