A lot of the work that coding agents do requires tons of random access to files, which MacOS is particularly slow at. Not because the hardware is bad, mind you. Mac SSDs are amazing. It’s the file system. Secondly, MacOS supervises processes for security reasons and coding harnesses spawn tons of processes. There is a lot of CPU overhead embedded in that supervision.
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A lot of the work that coding agents do requires tons of random access to files, which MacOS is particularly slow at. Not because the hardware is bad, mind you. Mac SSDs are amazing. It’s the file system. Secondly, MacOS supervises processes for security reasons and coding harnesses spawn tons of processes. There is a lot of CPU overhead embedded in that supervision.