![]() ![]() I can't currently find a way to disable warmd. Also, while an SSD can perform several reads and writes at different places on the disk with very little delay between operations, a hard disk can only do 1 thing at a time, so with thousands of requests in the queue, boot time will suffer. With an old hard disk instead of an SSD, this just gives the system a lot of busy work to do and may not be such a wise idea. Theoretically this will help your machine run faster when you actually try to use those applications/files. I think warmd pretends to load each of your 10 most frequently used applications and all the files you normally have open to "warm" its caches. On my 2017 15-inch MacBook Pro with SSD for storage, I see high CPU utilization immediately after reboot for a few minutes, but between the 8 threads and the very fast storage, I don't notice a significant slowdown. If you have a "spinning rust" disk drive instead of an SSD, I can imagine that it may hurt more than help. It's supposed to "warm" the cache with your most frequently accessed applications and files.
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