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Question: Mac Pro mid 2010 Pci-e SSD issue with El Capitan

I have a Mac Pro 5.1 running El Capitan and I have some strange issue with the Pci E SSD (SAMSUNG MZHPV256HDGL) I checked the speeds with BlackMagic and I got 80-100MB write speed and 1200-1400 MB read speed, it shouldn't supposed to be about the same for read/write speeds?User uploaded file

Logic Pro X, OS X El Capitan (10.11.6)

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Nov 12, 2017 2:22 PM in response to BenAvi In response to BenAvi

if you have not enabled TRIM, you now know why proponents of TRIM suggest that it is not optional. When you do not TRIM unused blocks, your drive eventually fills up with deleted data and Writes slow to a crawl.


Use this Terminal command in 10.10.4 or later:


sudo trimforce enable


... then enter your login password (which will not be echoed). It will read you the Riot Act, ask you to confirm this is what you want, and do a Restart. When it has restarted, future deletions will delete unused data blocks on the drive. But it will be no faster. To make it faster, you need to get rid of a lot of deleted data.


The way to do that is to Restart in Safe mode, which honors the setting of trimforce. During its Disk check, it will TRIM all the unused blocks. Then your drive will be measurably faster.

Nov 12, 2017 2:22 PM

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Question: Mac Pro mid 2010 Pci-e SSD issue with El Capitan