Review on Improve your iMac Security with the Kensington SafeDome Secure Lock (K64962US) by Matthew Evans

Easy to assemble but requires a lot of pushing the lock into the hub which needs to be precisely positioned to secure the connection. I never heard a "click" but it sure is. Once I figured that out, installation was a breeze. We have several iMacs that need protection. The security cable is thicker than I thought it would be and looks more secure than any laptop security cable we've bought. Works great for us.