MultiPatch

MultiPatch is a free macOS patching utility for users who need one application to apply or build files in several established patch formats. It suits ROM-hacking and software-preservation workflows that move between graphical and scripted work, while users who need every readable format to be creatable will encounter a clear boundary.

Overview

MultiPatch performs patch processing within the application instead of calling separate tools. In the graphical workflow, select a patch file or drag it onto the window, choose the file to modify, and select an output location. Format recognition is automatic from the patch filename extension, so an incorrectly named patch can prevent the expected format from being identified even when the underlying format is supported.

The project is released under the GPL, while its bundled patching libraries carry their own licenses. Version 2.0 adds an update checker that you can turn on or off in Preferences. Bug reports are directed to the project's GitHub Issues tab.

Key features

Broad application support

The app applies BPS, IPS, UPS, PPF, XDelta, BSDiff, and RUP (Ninja2) patches. That range is its strongest practical advantage: a Mac user handling files from different patching communities can use one native tool rather than collecting format-specific utilities. Check extensions before starting, because automatic detection depends on the suffix being correct.

Creation with a narrower format set

MultiPatch creates BPS, IPS, PPF, XDelta, and BSDiff patches. It cannot create UPS or Ninja2 patches, despite being able to apply them. Choose it when applying varied incoming patches is the priority; choose another utility when your authoring workflow specifically requires UPS or Ninja2 output.

BPS modes

BPS creation offers Linear and Delta modes. Delta output is usually smaller, but takes longer and uses more memory. It is appropriate for distributing compact patches when processing time and memory are available; Linear is the more sensible choice on constrained hardware or when faster creation matters more than file size.

Command-line option

A separate basic command-line version can apply or create patches. It gives script authors and terminal users a way to incorporate patching into repeatable jobs without using the graphical interface. Its basic positioning makes the desktop application the better fit for occasional interactive work.

Pricing

There is no paid tier, seat charge, trial period, renewal, or usage quota attached to the free plan. The trade-off is platform scope rather than price: this is a Mac-only option, and creation support excludes UPS and Ninja2.

Platforms

Version 2.0 requires macOS 10.9 or later. Native Apple Silicon support arrived in version 1.7.1, making current Mac hardware a supported target. Older releases cover Mac OS X 10.4 through 10.8, with format support varying by version; users on those systems should match an older release to the formats they need rather than assume current capabilities.

Who it's for

MultiPatch is a strong fit for Mac users applying patches in BPS, IPS, UPS, PPF, XDelta, BSDiff, or Ninja2 form and wanting the processing built into a single application. It also suits developers and hobbyists who need a simple terminal or scripting entry point. It is less suitable for Windows or Linux users, for anyone requiring UPS or Ninja2 creation, or for workflows where patch files commonly arrive with unreliable extensions.

Pros and cons

Pros

• Applies seven patch families, including RUP (Ninja2), so one tool covers a wide range of existing files.
• Creates five formats and offers BPS Linear and Delta modes, balancing speed, memory use, and output size.
• Built-in processing avoids dependence on external patch executables.
• Graphical and basic command-line versions support both one-off jobs and scripts.
• Free licensing for the application removes purchase and renewal costs.

Cons

• UPS and Ninja2 patches can be applied but not created, limiting format coverage for authors.
• Automatic format selection relies on a correct patch extension.
• Current support starts at macOS 10.9; older systems require version-specific releases with differing format support.
• Delta BPS creation trades smaller files for longer processing and higher memory use.

Alternatives

For a browser-based option that runs across Android, iOS, Linux, macOS, Windows, and the web, consider EZ ROM Patcher; it is also free and requires no stated account or installation. If you want MIT-licensed software for Linux, macOS, and Windows, IUBPatchLib is the alternative. rom-weaver suits users seeking free open-source browser and command-line versions without an account. For a narrower IPS/BPS tool on Linux, macOS, or Windows, choose Floating IPS (Flips).

Patcher64+ Tool is the better match for N64, NES, and SNES work on 64-bit Windows 7 or newer with PowerShell 5.1+. Gaming Optimizer is a free Windows project with a public MIT-licensed repository. Linux and self-hosted users can consider ROM Bin Patcher (rombp), while Rompatcher is a free Linux/Windows alternative without stated usage limits. Browse the broader ROM Patching Software list when you want to compare more tools.

Verdict

Choose MultiPatch if you use a Mac and want free, built-in handling for many patch formats, with a basic command-line path for scripts. Its main reason to leave is equally clear: creators needing UPS or Ninja2 output, or users outside macOS, need a different tool.