The Anatomy of a Mach-O
Posted4 months agoActive4 months ago
oliviagallucci.comTechstory
calmpositive
Debate
20/100
Mach-OMacosBinary FormatsCode Signing
Key topics
Mach-O
Macos
Binary Formats
Code Signing
The article explores the anatomy of Mach-O binaries, including their structure, code signing, and PAC, sparking a discussion about the history of multi-arch binaries on macOS.
Snapshot generated from the HN discussion
Discussion Activity
Light discussionFirst comment
4d
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2
84-90h
Avg / period
2
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- 01Story posted
Sep 2, 2025 at 12:29 AM EDT
4 months ago
Step 01 - 02First comment
Sep 5, 2025 at 12:43 PM EDT
4d after posting
Step 02 - 03Peak activity
2 comments in 84-90h
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Step 03 - 04Latest activity
Sep 5, 2025 at 3:56 PM EDT
4 months ago
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ID: 45099151Type: storyLast synced: 11/20/2025, 8:56:45 PM
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Fat binaries predate the PowerPC-to-Intel transition. They were used at NeXT to support a quite wide variety of hardware platforms, and were even used publicly in the "pure" PowerPC Mac era for... reasons that I encourage someone to dig into, but am not sure are fully disclosed.
Anybody still have a G5 cube?