.pptx .xlsx .cpgz ????????
i cannot open these files
my mac is 10.4.11
G-5 Powermac Early 2005, Mac OS X (10.4), SN#G853051TRTY
The first two types are Office 2007 and newer documents; Office 2008 and similar software can open them. A cpgz file is a compressed archive and can be opened by StuffIt Expander.
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