XIP

File Format
Name	XIP
Ontology	Electronic File Formats Archiving XIP
Extension(s)	.xip, .xar
PRONOM	fmt/600
Wikidata ID	Q1093556
Released	2011

XIP is a digitally-signed archive format created by Apple, similar to ZIP (able to archive multiple files and directories) but with authentication possible via public/private keys.

It is reportedly based on Xar and gzip.

Apple states that "Starting with macOS Sierra [2016-09], only XIP archives signed by Apple will be expanded."[1]

Links

• Man page for OS-X
• Wikipedia: .XIP