A new free Mac application, WhatCable, is making waves by revealing the hidden capabilities of USB-C cables. Users often find it challenging to differentiate between USB-C cables, which can appear identical but have varying performance levels. This app uncovers the truth about what each cable can truly handle, emphasizing that a USB-C port does not necessarily guarantee high speeds. With WhatCable, MacBook Air users and others can finally get clarity on their cables and avoid confusion regarding their download speeds and functionalities.