I'm wondering if there's a way to disable the dashboard in Mountain Lion. I never use it and I think it's consuming processor and memory powers.
With macOS 10.10 Yosemite or later, you can go to
System Preferences → Mission Control and switch Dashboard to Off.
On any OS with Dashboard, you can disable it through Terminal with the following command:
defaults write com.apple.dashboard mcx-disabled -boolean YES && killall Dock
It can be re-enabled with:
defaults delete com.apple.dashboard mcx-disabled && killall Dock
If you don't want to use Dashboard at all, free Apps are available to disable & enable (if you wish to revert) it including:
Alternatively see also this Youtube tutorial published on August 9th 2013 entitled "Removing the Dashboard (MacMost Now 902)"
To permanently disable Dashboard
enter these commands, authenticate when prompted:
defaults write com.apple.dashboard mcx-disabled -boolean YES; killall Dock sudo mkdir /System/Library/LaunchDaemons\ (disabled) sudo launchctl unload -w com.apple.dashboard.advisory.fetch.plist sudo mv /System/Library/LaunchDaemons/com.apple.dashboard.advisory.fetch.plist \ /System/Library/LaunchDaemons\ (disabled)/