MP 1,1-5,1 NEED HELP!!! MPC5,1 Dual CPU running Sonoma 15.4.1, but only half core working

[Harrytse]

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Mac Pro Early 2009
Processor: 2 × 3.46 GHZ 6-Core Intel Xeon
Graphics: AMD Radeon RX 580 8GB
Memory 96 GB 1333 MHZ DDR3
macOS Sequoia 15.4.1

 

[tsialex]

You are interpreting the CPU usage window completely wrongly.

Your Mac Pro only have 12 real cores, the other 12 that the CPU usage window is showing are the Intel Hyper-Threading and only will be ever used if you are running an app that is massively multi-threading and compatible with Hyper-Threading, like some scientific apps, some Xcode compilation or maybe when doing batch Handbrake.

Btw, Apple mostly deprecated Intel Hyper-Threading around Mojave era with the mitigations for speculative execution/Spectre vulnerabilities.

 

[Harrytse]

You are interpreting the CPU usage window completely wrongly.

Your Mac Pro only have 12 real cores, the other 12 that the CPU usage window is showing are the Intel Hyper-Threading and only will be ever used if you are running an app that is massively multi-threading and compatible with Hyper-Threading, like some scientific apps, some Xcode compilation or maybe when doing batch Handbrake.

Btw, Apple mostly deprecated Intel Hyper-Threading around Mojave era with the mitigations for speculative execution/Spectre vulnerabilities.

Thank you for your professional answer, I understand now that I misunderstood.