Downloading BlackMirror 1.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The program lies within System Tools, more precisely Backup & Restore.
This app's bundle is identified as Black Mirror.Wineskin.prefs. The following version: 1.2 is the most frequently downloaded one by the program users. This free Mac app is a product of Bernhard Waldbrunner. 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 most frequent installer filename for the program is: blkmror-1.2.tar.gz.
From the developer:
Black Mirror is a tool which syncs and backs up data between one or more computers and external storage devices. No daemon or database required.
If you have two computers which should sync their files with each other, you just need an external hard disk, which will Black Mirror automatically use as a backup storage.
You may want to check out more Mac applications, such as AVerVision, Tri-BACKUP 404 OS X or FatMac Backup, which might be similar to BlackMirror.