For , finding a modern PDF editor is challenging due to the age of the operating system. Most current software requires at least macOS 10.12 or newer. However, several legacy versions of professional software and specialized lightweight tools still support this OS. Native & Free Built-in Options

Running OS X 10.7.5 in 2025 (or later) is inherently risky. The last security update for Lion was released in . Any PDF editor you install, especially one downloaded from an unofficial archive, could be a vector for malware. Always:

The most convenient option is already installed on your Mac. Apple Preview is surprisingly robust for basic tasks. While it cannot edit the underlying text of a PDF directly, it is excellent for: : Adding text boxes, shapes, and highlights.