Early this morning Beijing time, Apple released the official version of macOS 15.5 (internal code name 24F74) to the world. This is another important system iteration, 26 days after the previous version was released on May 17. The update upgrades home digital management scenarios and simultaneously releases several security performance enhancement solutions.
The update shows that when a child sets or changes a Screen Time password on a Mac device, a real-time pop-up reminder will be displayed on devices associated with the Family Organizer. This improvement effectively fills the blind spot in device management and allows parents to immediately keep track of changes to minors' system permissions. It is regarded by the industry as the "invisible guardian" of home digital education.
In terms of system security, the update includes fixes for three major vulnerabilities covering Safari privacy protection, file sharing permissions, and disk encryption modules. According to the developer community, one of the vulnerabilities involves the risk of a memory buffer overflow with a maximum threat level of CVSS 8.1. Apple encourages all compatible devices to update immediately, especially professional users who work with sensitive data.
For older devices that cannot be upgraded to macOS 15, Apple will continue its "full lifecycle support" strategy and release two version updates simultaneously: macOS Ventura 13.7.6 and macOS Sonoma 14.7.6. This maintenance covers a number of classic models, including the 2015 MacBook Air, and some security patches are also suitable for devices released 10 years ago.
Users can get the approximately 3.2 GB installation package through the "Software Update" module in System Preferences. Please note that due to time lags in synchronizing global CDN nodes, users in some regions may receive push notifications with a delay of 15 to 30 minutes. In the technical forum, it is recommended to make sure that the device has at least 50% battery remaining and is connected to a stable Wi-Fi network before upgrading.
According to the update log, the efficiency of inter-device collaboration with iPhone has also been optimized, and the stability of AirDrop transmission has been improved by 23%, but specific technical details have not yet been revealed. The developer especially cautions that some professional development tools may have temporary adaptation issues, so users who use virtual machine environments should check the compatibility list.