David Hanak Apple released a new iOS 11.2.2 update today after XNUMXpm, which is available to all users with compatible phones. The new update focuses primarily on an exploit called Spectre, which could allow unauthorized access to the device's system using the default Safari browser.
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Dan Pražák Apple strongly recommends that all users install this update. It is not yet clear if the update contains any other changes in addition to the above. If so, it will appear on the site in the next few hours. The update is available via the classic OTA method in Settings - In general - updates software. The size is roughly 60 MB. You can find detailed information about security fixes <a href="https://cdn.shopify.com/s/files/1/1932/8043/files/200721_ODSTOUPENI_BEZ_UDANI_DUVODU__EN.pdf?v=1595428404" data-gt-href-en="https://en.notsofunnyany.com/">here</a>.
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In addition to the new update for iOS, the macOS 10.13.2 update is also out, which basically addresses the same threats that the article above refers to. In this case, it is also about additional system modifications responding to the security shortcomings of Intel processors. An update for macOS is available in Mac App Store.
Good evening, in the case of the iMac, does this mean that after the update our iMac will slow down???
Thank you for the info.
I think not. Or at least not very noticeably. The fix certainly does not turn off conditional execution, it just prevents easy access to the cache memory of the processor where there is an unused code branch.
Yes and no.
The deceleration depends on the activity being performed. Sometimes it is immeasurable, sometimes it is pronounced. If the system accesses a large number of small files, the slowdown can be tens of percent. For example, some database system, mass processing of photos, compilation of a large project with small files and similar activities can slow down significantly.
During normal activities such as accessing the Internet, e-mails, watching videos, listening to music or office work, no one will probably notice the slowdown.
iMac 5K i7-4790K 4GHz in Geekbench 4
before update:
single-core: 4857
multi-core: 15827
after update:
single-core: 4667
multi-core: 15594
Slowdown single-core 4%, multi-core 1,5%.
Daniel Čada, iMac Pavel: it is an iOS update. What does this have to do with the iMac?