OnyX is the best free Mac cleaner apps and it brings a wide array of features to remove all junk files from your device. Let’s dive right in! Best Free Mac Cleaner in 2020: OnyX Below you can pick your preferred free Mac cleaner software to speed up your Apple laptop easily and quickly. Last year I tested more than 15 free Mac cleaners and picked the best ones for you to choose from. With so many Mac cleaner applications offered on the market today, which one you should pick? Do you know how to pick the best free Mac cleaner?