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MacRumors
(20-Core M1 Ultra, 128GB) Sluggish performance, Safari taking 30% my CPU, and other things...
Users are experiencing performance difficulties with the 20-Core M1 Ultra, particularly related to Safari's high CPU usage, reportedly taking up to 30% of resources. This sluggishness raises concerns about the chip's efficiency and the software optimization of Safari. As these issues surface in user forums, they highlight the potential need for updates or an investigation into application performance.
MonitorConfidence: MediumShort term horizon
Published 23 Aug 2026, 19:45 UTC1 min read
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Summary
TL;DR
- 20-Core M1 Ultra reported to have sluggish performance.
- Safari consuming as much as 30% CPU resources.
- User experiences shared in MacRumors forum.
- Performance issues may affect overall user satisfaction.
- Potential implications for Apple's software optimization strategies.
Interesting facts
- High CPU usage in browsers like Safari can significantly affect multi-tasking capabilities.
- User forums often provide real-time insights into hardware performance issues.
What changed