IMG File Documentation

Overview

Feature Value
Primary Usage Macintosh Disk Image
File Extension .img
MIME Type application/x-img
Developed By Apple Inc.
File System Support HFS, HFS+, APFS
Compression Optional (ZIP, ADC, or none)
Encryption Optional (AES-128 or AES-256)
Maximum Volume Size Dependent on file system
Partition Scheme Support GPT, MBR, APM
Bootable Yes, for Mac systems
Readable on Windows With third-party software
Readable on Linux With third-party software
Metadata Support Yes
Archive Utility Integration Native on macOS
Usage in Software Distribution Frequent for macOS applications
Signature Varies, but often starts with "koly"
File Size Limit Dependent on file system and compression
Multi-volume Support No
Sequential Access No, random access supported
Typical Use Cases Software distribution, system backup, file storage