Enable TimeMachine for Unsupported Drives

By Default, TimeMachine only supports Network Drives capable of the "afp" protokoll. The problem is, that these drives often are more expensive then regular one's dedicated for use in Windows Networks. MacOS X Supports "smb" protokoll too, but TimeMachine would not accept those drives by default. Following there is a short guide, how to enable that support. You will need the Terminal Console, so open it an continue:

1. Enable use of unsupported drives

defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

2. Create Sparsebundle File

hdiutil create -size 200G -fs HFS+J -type SPARSEBUNDLE "MACNAME_MAC-adress.sparsebundle"

where:
-size defines Max. space used for Backups
MACNAME is the name of your Mac e.g. iMac
MAC-Adress is the MAC adress of your Ethernet Card

3. Mount Share and copy Sparsebundle File

Now mount the NAS Share to your Mac and copy the sparsebundle file onto.

Take care the share is mounted always and start TimeMachine. Now you're Done.