Troj/DocDl-AHI Troj/DocDl-AXZ Troj/DocDl-IF Troj/Dyreza-ET They are located in my Time Machine and require manual clean up. Before I start doing that, are these Windows only threats or do they compromise an iMac, too? Thanks very much

Hello -

A Sophos Home Edition 9.4.2 scan of my iMac (OS 10.7.5) found the above Threats. 

They are located in my Time Machine and require manual clean up.  Before I start doing that, are these Windows only threats or do they compromise an iMac, too? I don't know that much about viruses and malware.   Thanks very much