High Sierra’s S/MIME encrypted email has improved handling, and validation of S-MIME certificates has been improved, to mitigate more EFAIL vulnerabilities.two kernel bugs have been fixed in High Sierra, and two in El Capitan and Sierra.a vulnerability in GCD has been fixed, which allowed sandboxed processes to circumvent the sandbox restrictions.a vulnerability allowing modification of EFI flash memory by processes running as root has been fixed.improved object management in Bluetooth, which prevents malicious apps from determining kernel memory layout.apache_mod_php is updated to php version 7.1.16.The list of security fixes is quite long, and contains some important ones.
There is no mention of whether 10.13.5 extends support for APFS to Fusion Drives. The High Sierra update still seems very large: its App Store download is 2.12 GB in size.
The only new user feature identified by Apple is Messages in iCloud, which Apple states is a feature of High Sierra only there is no comparable option in the Sierra version of the Messages app. Apple has today released the expected update to High Sierra, to bring it to version 10.13.5, together with security updates (2018-003) for El Capitan and Sierra.Īlmost all Macs also have a bundled EFI firmware update included.
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