With the minimal information you shared, nobody is able to help.
OS and version?
When does the error occur?
I installed Photoshop Lightroom 6 on my MacBook Pro (13 Zoll, Mitte 2010) with 8 GB 1067 MHz DDR3 and 2.66 GHz Intel Core 2 Duo, but now comes the massage error 5!!!! And now?