Apple has released this webpage and seems like a lot of computer are at risk.


How does disabling hyper-threading affect hardware and software performance of a specific Mac?

How to run the tests?

  • 1
    Questions that are “Why did Apple do X?” are off-topic. See the help guide. If you can edit this to be about how to do something - if you can show your research and explain how it doesn’t help us use products / make a configuration change - that is certainly on-topic. I could see quite a few questions that go on the premise “Since Apple has made this change X, how can I decide to do Y?” that are on-topic. – bmike May 16 at 18:48
  • @bmike: Could you explain what impact this has on Apple HW & SW performance? – advancecoder56 May 16 at 19:02
  • 1
    I believe the page itself addresses the issue satisfactorily. I don't think anybody on this site can add more to what Apple is talking about, but I may be wrong. Testing conducted by Apple in May 2019 showed as much as a 40 percent reduction in performance with tests that include multithreaded workloads and public benchmarks. Performance tests are conducted using specific Mac computers. Actual results will vary based on model, configuration, usage, and other factors. – IconDaemon May 16 at 19:19
  • @advancecoder56 that would make a great edit to the question. Either how to measure performance or if people are able to measure / quantify performance with this enabled or disabled. – bmike May 17 at 2:57

You must log in to answer this question.

Browse other questions tagged .