# grsimwrite-mac: reconstructing GRSIMWrite for macOS

> grsimwrite-mac reconstructs the Windows GRSIMWrite 4.4.10 SIM-writing workflow in Python for macOS. Its research records card-family profiles and APDU write behavior, while the implementation identifies cards, reads elementary files, writes selected fields, and builds formatting sequences.

- Type: Case study
- Targets: App · Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-06
- Original resource: <https://github.com/eliel9012/grsimwrite-mac>
- Primary source: <https://github.com/eliel9012/grsimwrite-mac/blob/280c56527747a4ab3b720db550edac84e9046ecd/README.md>
- Catalog page: <https://awesomerea.org/resources/grsimwrite-mac-case/>
- Record JSON: <https://awesomerea.org/resources/grsimwrite-mac-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/grsimwrite-mac-case/index.md)

## Requirements & limits

- **Prerequisites:** macOS, a PC/SC card reader, and the pyscard and pydes dependencies are required for card operation.
- **Testing evidence:** The author reports 41 offline unit tests using mocks, without hardware.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/eliel9012/grsimwrite-mac/blob/280c56527747a4ab3b720db550edac84e9046ecd/README.md>
2. <https://github.com/eliel9012/grsimwrite-mac/blob/280c56527747a4ab3b720db550edac84e9046ecd/docs/PLANO.md>

## More in Apps

- [JADX-AI-MCP](https://awesomerea.org/resources/jadx-ai-mcp/index.md) · Integration
- [apktool-mcp-server](https://awesomerea.org/resources/apktool-mcp-server/index.md) · Integration
- [frida-mcp (yfe404)](https://awesomerea.org/resources/frida-mcp-yfe404/index.md) · Integration
- [Super Trouper](https://awesomerea.org/resources/super-trouper/index.md) · Integration
- [Frida](https://awesomerea.org/resources/frida/index.md) · Tool
- [JADX](https://awesomerea.org/resources/jadx/index.md) · Tool

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.