Having announced new speculative execution using Intel CPU architecture, Apple has posted a new document on its website explaining how customers with "increased risk" of attacks can enable complete reduction. Complete limitation is not enabled by default, as there is probably an excessive amount of security for the average user, and it comes with high performance penalties.
In their tests, Apple recorded up to 40 percent decline in full-reduction performance. This is because activating MDS protection completely disables hyper-threading and adds more barriers when the processor shifts.
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The complete reduction mode may be of interest to customers who are particularly vulnerable, such as government members or senior business executives.
It is also important to emphasize that the father is currently only a theoretical concern and there are no known attacks in the wild that affect Macs. Of course, Apple recommends users only download reliable software from the App Store.
With these qualifications in mind, to enable complete limitation, follow these steps:
- Restart your Mac and hold the Command key and the R key to enter macOS Recovery mode.
- Open Terminal from the Tools menu.
- Enter the command & quot; boot boot args = "cwae = 2" (without single quotes) and press Enter.
- Enter the command & # 39; nvram SMTDisable =% 01 & # 39; and press Enter.
- Then start your Mac.
For more information on this process, check out the support documentation, including instructions on how to check if hypertrophy is disabled and step to disable full reduction if you no longer need it. These speculative driving utilization especially affects the Intel CPU architecture and poses no risk to Apple's ARM chips in iPhones and iPads.
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