macOS 27.0 (26A428) for Mac Studio (M5 Ultra)
Currently signed — installable
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Jailbreak compatibility
No jailbreak
There is no public jailbreak for macOS 27.0 on Mac Studio (M5 Ultra).
Tip: Beware of sites that charge for a jailbreak or ask you to install a profile. Real jailbreaks are always free and open source.
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Firmware information
Version
27.0
Build ID
26A428
Release date
Sep 14, 2026
Upload date
Sep 4, 2026
File name
UniversalMac_27.0_26A428_Restore.ipsw
File size
24.80 GB
MD5
d5a1f2c4dcb9b0ed974554c67aa6a4a1
SHA1
2d17f2fe0d7726dd66f0522fdb9ad162942c3f3d
Device information
Device
Mac Studio (M5 Ultra)
Identifier
Mac17,15
BoardConfig
J775dAP
Platform
t6050
CPID
24656
BDID
18