Gradually, the manufacturers of operating systems will releasing updates to protect users against security flaws that affect almost all processors in the world. Apple had already released fixes for the Meltdown and the Spectre in the macOS and iOS; now it is time to strengthen the barrier against the Spectre.
While the Meltdown is restricted to Intel chips, the Spectre affects basically all of the chips produced in the last 20 years. The loophole allows an application to leak sensitive information to another application. It is more difficult to exploit, but also more difficult to correct, therefore, companies are trying to mitigate the failure to the few.
The update supplement of the macOS High Sierra 10.13.2 was released this Monday (8). Who still runs an old version of macOS, such as the Sierra (10.12.6) or the El Capitan (10.11.6), is also getting the Safari 11.0.2 to shield the tabs of the browser against the Spectre.
The iOS 11.2.2 update the Safari and the WebKit rendering engine to mitigate the effects of the Spectre. The update is already available for all users with iPhone 5s or higher iPad Air or higher, and iPod touch 6th generation.
The Apple is the direct to inform you that “all systems Mac and iOS devices are affected”. According to the company, to install the Safari update, there is a loss of 2.5% of performance in one of the benchmarks (JetStream), but “no measurable impact” on other tests.