PCSX2 is the most popular PS2 emulator for PC. It's compatible with Windows, Linux, and macOS.
After years of slow progress and a codebase that was increasingly difficult to maintain, the inevitable happened. A 2019 commit by a developer named lightningterror removed fps2bios from the master branch of the PCSX2 source code. The commit message was final and decisive: "Remove fps2bios from master branch. ". fps2bios
The official way to obtain a BIOS is to "dump" it from your own physical PlayStation 2 console using homebrew tools. PCSX2 is the most popular PS2 emulator for PC