Can't install Android plugin for Eclipse on MacOS X (Leopard)

When I try to install the Android p开发者_运维问答lugin for Eclipse on MacOS X (Leopard), I get the error:

Cannot create tempfile for site.xml Permission denied

I'm not sure what permissions the system is referring to.

I have set this up on a Linux distro with no trouble at all.

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Is this displayed in a dialog in Eclipse? Is there a button to show more details?

Which directory is your Eclipse installation in? Within your home directory, or somewhere else on the system that you wouldn't normally have permission to write to?

Which step of the installation is this? While trying to locate the plugin using the "Install New Software..." dialog, or somewhere else?

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As it turns out I had to install Eclipse and apply updates, including the addition of the Android plugin, as root user.