No, Capital IQ's Excel plug-in cannot be installed directly onto a Mac.
However, users with Macs have several options for installing and using the Office Plug-in via additional software tools (not provided through USC). Once a Windows environment (with Excel) has been set up on the Mac, options include:
Apple Bootcamp - a collection of Windows drivers for Mac hardware provided by Apple that enables Macs to run Windows natively. Bootcamp users must “dual boot” between MacOSX and Windows. This product comes free with MacOSX 10.5 (Leopard) and later.
Virtualization software (Parallels, VMware Fusion) - Virtualization software makes it possible to run a full, self-contained instance of Windows within MacOSX.