To know if TRIM is enabled for a particular drive, open “System Profiler” and search for the “TRIM enable” information in the “Serial ATA sub-tree”.
If TRIM is not enabled, the easiest way to enable it is to:
- Download Trim Enabler
- Install “Trim Enabler”
- Run ”Trim Enabler” and enable TRIM
- Power off your computer and power it on again
- Start “System Profiler” and look if TRIM is enabled as described above
Be aware that some SSD does not support TRIM.