To see Mac shares you need to enable file sharing on the Mac and choose the right protocol on the Mac.
Follow these instructions and choose SMB protocol.
»support.apple.com/kb/HT1549?view ··· le=en_US
Note: expanding "Choose the appropriate network protocol to communicate with the type of computer that's accessing your shared files"
Will show you how to choose the SMB protocol.
Also, might want to get this moved to the Mac forum.--
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