I follow all instruction yet the installer doesn't run. Any suggestions?

Sound like you need the Leopard installer.

[url=https://www.tapspace.com/pages.php?pageid=2]Get it here.[/url]

Make sure you follow the directions there, especially the part about dragging the .nkx files into the Virtual Drumline 2.5 Folder. Also, there is a 2.5.1 update that you'll want to install once you've gone through the initial setup process. 

If you plan on using it in Sibelius, make sure you pick up the [url=https://www.tapspace.com/VDL-Template-for-Sibelius-6-pr-95.html]Sibelius Template[/url].
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