Avatar of steveurich
steveurich
Flag for United States of America asked on

Can Apple's New Trim Utility work on an external USB3 Samsung 850 SSD

Mac OS X 10.10.4 Supports TRIM for Third-Party SSD Hard Drives
Tuesday June 30, 2015 9:07 pm PDT by Husain Sumra
Earlier today Apple released OS X 10.10.4, an under-the-hood update to OS X that introduced several bug fixes and improvements. One improvement, according to Ars Technica, is support for TRIM for third-party SSD hard drives. We previously covered TRIM likely coming natively to the next version of OS X El Capitan but it appears support has already arrived.

trimforce
Photo via ArsTechnica
With today’s OS X 10.10.4 update, however, Apple has added a command line utility that can be used to enable TRIM on third-party SSDs without having to download and install anything. Called trimforce, the utility can be executed from the OS X terminal, and it requires a reboot to start working.
TRIM is a system-level command that allows the operating system and the drive to communicate about which areas of the drive are considered unused and thus ready to be erased and rewritten to. In the absence of TRIM, users can see significantly slower drive writes as the drive begins to fill up. Most modern operating systems support TRIM but for Apple's OS X, it has only included support for its OEM SSDs. This means that Mac users looking to install an after-market SSD in a machine originally intended for spinning disc hard drives would run into trouble without the help of other third-party tools.

To enable TRIM, a user just has to type "sudo trimforce enable" into the Terminal window. Ars Technica points out that running TRIM prompts a "scary" message from the system, but notes it's largely because each SSD implements TRIM in a different way, with older disks sometimes acting in a way OS X would not expect.

MacRumors forum readers have been testing and discussing the update in our forums and sharing their experiences.

Tags: OS X 10.10.4, TRIM
Apple HardwareStorage Hardware

Avatar of undefined
Last Comment
steveurich

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Kimputer

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
steveurich

ASKER
Thanks. I have asked Apple tech-support says well as many others and no one gave a clear answer is you did
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck