Accessibility is a feature built into macOS and these apps can not function without permission to use Accessibility:

• Cinch, FinderMinder, SizeUp, and Tuck use Accessibility to move and resize windows.
• iClip uses Accessibility to invoke copy & paste.
• KeyUp, JazzUp, and ShortcutDetective use Accessibility to intercept keystrokes.

Follow these steps to enable Accessibility depending on your version of macOS:

Select macOS version: 14 (Sonoma) 13 (Ventura) 12 (Monterey) 11 (Big Sur) 10.15 (Catalina) 10.14 (Mojave) 10.13 (High Sierra) 10.12 (Sierra) 10.11 (El Capitan) 10.10 (Yosemite) 10.9 (Mavericks) 10.8 (Mountain Lion) 10.7 (Lion) 10.6 (Snow Leopard) 10.5 (Leopard)

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Enable Accessibility on OS X 10.8 Mountain Lion

Open System Preferences > Accessibility

Enable Accessibility

Check the box next to "Enable access for assistive devices" in the lower left.