The simple, intuitive UI may not appeal to all Mac users but what it lacks in looks it makes up for in efficiency. Removing this data also protects your anonymity meaning you can browse online more securely. This frees up valuable hard disk space allowing your system to run faster. CCleaner removes cookies, temporary files and various other unused data that clogs up your operating system. Piriform’s CCleaner is a quick and easy to use program which makes your Mac faster and more secure. While CCleaner has been the most popular PC maintenance tool for over a decade, it is relatively new to the Mac platform.