I have a MacBook Pro 13" (non-retina) from 2012 with a 512GB HDD. I've run some speed test with BlackMagic and those are around 75-80MB/sec for read/write. This seems slow, but maybe this is normal for this configuration.
Are these normal values?
MacBook Pro 2012, HDD speed 80MB read/write normal
hddmacbook properformance
Related Solutions
How long did you have TrimEnabler running? It will only help over time, when through deleting files the SSD knows that the file clusters are no longer needed.
You can try to enable it, create a very large file (that takes up a significant chunk of your free space) and then delete it.
cd /tmp
mkfile 10240m 10Gigfile
rm 10Gigfile
Check to see what your Serial-ATA link speed is. You can find this in system profiler.
It will be something similar to this.
If your speed isn't 6 Gigabit but is 3 Gigabit then that would be why you aren't getting the speeds you'd expect.
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Best Answer
Those kinds of speeds are to be expected from a MacBook HDD. For much higher speeds, consider upgrading the HDD to an SSD. (See Macbook Pro Hard drive speed)