RODBC Package

Hello R-Help,

is there any way of using the RODBC Package on a Mac OS X 
System? If yes, what do I need to get it running. Concerning these 
issues, I am pretty unexperienced, so please state any step 
necessary. The actual problem is accessing data in Excel- files. 
(unfortunately no alternative way of entering the data). 
I already installed the Package, but it says the following:

versuch <- odbcConnectExcel("Thermanali-Versuch.xls")

Error: couldn't find function "odbcConnectExcel"

Thanks in Advance

Stephan Freyberger