memwatch vs ProMod

memwatch is a free, open-source macOS utility for searching and changing values in a running process’s memory through an interactive interface. Searches can target strings, floating-point numbers in 32- or 64-bit formats, and signed or unsigned integers from 8 to 64 bits. Comparisons such as equal, greater than, or less than can narrow results. Once values are found, memwatch can read, write, monitor, freeze, or unfreeze them. Its interface also has commands to pause and resume a target process and send it Unix signals, though execution-state support is described as experimental. The project presents memwatch as a macOS memory editor and says it should build and run on recent OS X versions. Its author describes using it for game cheats and as a debugging aid alongside tools such as gdb. Installation requires building from source with phosg and libamd64, then running make and sudo make install. Attaching to a target process uses sudo. The MIT License permits use without charge and supplies the software without warranty.

ProMod manages memory modifications for individual processes on macOS and iOS. On a Mac, it writes four-byte ARM instructions into a target process and automatically uses code caving for larger patches. Special mods can follow an address in a CPU register and monitor or rewrite float or int32 values when thresholds are met. One-instruction mods can use hardware breakpoints without writing to the target app’s memory; the FAQ says a Mac processor allows six at a time. Keyboard shortcuts can trigger one or several mods, with audible cues. Setups can be saved and shared as portable .pro files, with built-in or password encryption. Bytes Diff scans for memory changes, and Memory Locator searches for hex patterns. Users can enter raw hex or ARM64 assembly, which ProMod assembles, and disassemble surrounding instructions. The Mac app requires an Apple Silicon Mac with macOS 12.0 or later; Intel Macs are unsupported. ProMod Mobile runs on non-jailbroken iOS devices but requires injecting libProModMobile.dylib with Sideloadly or a similar tool. The maker describes it for debugging, learning, single-player, and offline use.