The 1.1.86 version of PhotoKeeper for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this software for Mac is sLonely. The application lies within Security Tools, more precisely Personal Security.
From the developer:
PhotoKeeper is an application designed to protected your private photos. With this program, you will be able to protect your photos with a password. All your imported photos are encrypted and moved to a private database, so that no other application can view them.
You may want to check out more software for Mac, such as PasswordVault Lite or BestCrypt, which might be related to PhotoKeeper.