DMG vs TAR
Ein detaillierter Vergleich von Apple Disk Image und TAR Archive — Dateigröße, Qualität, Kompatibilität und welches je nach Workflow zu wählen ist.
Apple Disk Image
Archives & CompressedDMG (Apple Disk Image) is the standard disk image format on macOS for distributing software. It can contain a complete file system with compression and optional encryption, and supports internet-enabled auto-mounting for seamless app installation.
Über DMG-DateienTAR Archive
Archives & CompressedTAR is a Unix archive format that bundles files together without compression. It is commonly combined with gzip or bzip2 for compressed archives and is the standard for Linux software distribution.
Über TAR-DateienVorteilsvergleich
DMG Vorteile
- Universal macOS distribution format since 1999.
- Compressed or encrypted variants available.
- Can be bootable (used by recovery and installer DMGs).
- Custom backgrounds and layout create polished installer experience.
- Preserves Mac-specific filesystem metadata (extended attributes, resource forks).
TAR Vorteile
- Streamable — you can tar files straight to a network pipe, no seek needed.
- Preserves Unix permissions, ownership, symbolic links, and timestamps.
- Universally supported on Unix-like systems.
- Simple format — the GNU tar source has been stable for decades.
- No compression overhead — pair with gzip/xz/zstd as needed.
Einschränkungen
DMG Einschränkungen
- macOS-only — Windows and Linux need third-party tools.
- Proprietary container with limited public documentation.
- File sizes are often larger than equivalent ZIP or 7z.
- Opaque to most antivirus and malware-scanning pipelines.
TAR Einschränkungen
- No built-in compression — plain .tar files are the same size as their contents.
- No random access — reading one file requires scanning from the start.
- Windows tooling is second-class — PowerShell only added native tar in 2018.
- Multiple incompatible header variants (v7, ustar, POSIX, GNU) over the years.
Technische Spezifikationen
| Spezifikation | DMG | TAR |
|---|---|---|
| MIME type | application/x-apple-diskimage | application/x-tar |
| Extension | .dmg | .tar |
| Container types | UDIF (Universal Disk Image Format) | — |
| Compression | UDCO (zlib), UDBZ (bzip2), UDZO (LZMA), ULMO (LZMA) | — |
| Encryption | AES-128 or AES-256 | — |
| Block size | — | 512 bytes (traditional) |
| Header variants | — | v7, ustar, POSIX.1-2001 (pax), GNU |
| Max filename length | — | 100 bytes (v7); unlimited (pax extended headers) |
Typische Dateigrößen
DMG
- Small macOS app 5-30 MB
- Xcode installer ~12 GB
- macOS installer (full) 12-15 GB
TAR
- 1 MB of source files (uncompressed .tar) ~1 MB
- Same files as .tar.gz 150-400 KB
- Linux kernel source (.tar.xz) ~120 MB
Bereit zum Umwandeln?
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Häufig gestellte Fragen
DMG (Apple Disk Image) is an archive format used to bundle multiple files and folders into a single compressed file. The archive preserves the directory structure and typically reduces total size via compression. DMG sits in the archives & compressed family and has specific strengths around compression ratio, speed, or platform support.
DMG (Apple Disk Image) is an archive formato used to bundle multiple arquivos e folders em a single comprimido file. The archive preserves the directory structure e tipicamente reduces total size via compressão. DMG sits no archives & comprimido family e has specific strengths around compressão ratio, speed, ou plataforma support.
7-Zip, WinRAR, The Unarchiver (macOS), and the built-in archive utilities on Windows and macOS open most DMG files. For command-line extraction, 7z, unar, or the format-specific tool handles DMG cleanly. If your extractor does not recognise DMG, convert to ZIP first — ZIP opens on every operating system without extra software.
7-Zip, WinRAR, The Unarchiver (macOS), e the built-in archive utilities no Windows e macOS abrir most DMG files. para command-line extraction, 7z, unar, ou the formato-specific tool handles DMG cleanly. If your extractor does not recognise DMG, converter to ZIP first — ZIP opens on every operating system sem extra software.
Upload the DMG to KaijuConverter and pick ZIP, 7Z, TAR.GZ, or RAR as the target. Our pipeline extracts the original archive and re-compresses the contents into the target format. File permissions, timestamps, and directory structure are preserved where both formats support them.
Depends on the goal. ZIP is the universal baseline — every OS extracts it out of the box. Formats like 7Z or TAR.GZ compress better but require specific tools. DMG may win on compression ratio, password support, or OS integration for specific workflows; ZIP wins on raw compatibility.