Hex Fiend is a fast and clever open source hex editor for macOS that does not limit users to in-place changes like some hex editors. Hex Fiend can handle as big a file as you’re able to create. It’s been tested on files as large as 118 GB.
It has a mall footprint and does not keep files in memory. You won’t dread launching or working with Hex Fiend even on low-RAM machines.
Hex Fiend can open a huge file, scroll around, copy and paste, all instantly. Find what you’re looking for with fast searching.
Hex Fiend can show the differences between files, taking into account insertions or deletions. Simply open two files in Hex Fiend and then use the File > Compare menus.