# Mach-O binary (64-bit) — file signature FE ED FA CF at offset 0 0x1000 For Mach-O binary (64-bit), hex signature is FE ED FA CF; offset is 0 0x1000, verified against its source on 2026-09-22. - **Hex signature:** FE ED FA CF _(verified: appears in the quote below)_ - **Offset:** 0 0x1000 _(verified: appears in the quote below)_ - **Format:** Mach-O binary (64-bit) _(verified: appears in the quote below)_ ## What the source says > FE ED FA CF | þíúÏ | 0 0x1000 | | Mach-O binary (64-bit) | ## Source - https://en.wikipedia.org/wiki/List_of_file_signatures Last verified: 2026-09-22. Review by: 2027-09-22. Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).