There are incompatibility issues with Mac OS 10.7 (Lion)+ and LabPrints. Please follow the following steps as applicable:

Mac "Gatekeeper" prevents LabPrints from being installed on some machines. You will notice the error message that the "application is damaged" . If you are not seeing this error message, then skip this step. To fix this problem please watch this video, or follow these steps:

VIDEO Instruction for this step: http://screencast.com/t/pk1GAJztFKmT

Please go to the apple menu, select system preferences, then security and privacy: http://images.macworld.com/images/article/2012/02/gatekeeper-settings-large-272449.jpg

From there you can set to "anywhere" to install LabPrints on Mountain Lion.

UPDATED MAC INSTALLERS: 

1) For Digital Studio, download here: http://www.labprints.com/labprints/install/lion/LabPrintsMacLion.dmg

2) For Production Studio, download here: http://www.labprints.com/labprints/install/production_studio_v5/Mac/ProductionStudioV5.dmg

NOTE: If you already have an old version of Production Studio on your mac, you must remove the Production Studio v5 folder from Applications/LabPrints/Production Studio v5 before installing.

NOTE: You may need to create a NEW test project with your OLD lab to have your old projects show up if upgrading to Lion or Mountain Lion.

IF YOU USE THE LABPRINTS STOREFRONT: Watch this video, and apply this easy step: http://screencast.com/t/HioJI569u9zh