SSD firmware update on a Mac

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To update the firmware on your SSD, follow the steps below. Please ensure you are using an internal SuperDrive for the update, and that your SSD is internally connected to a SATA port.


OSX 10.5 to 10.11

1. Download the latest firmware here : 
2. In Finder, click on the .iso to highlight it. Hold down Control and click on the .iso a second time.
 3. Select “Open With” in the menu that comes up,  then select Disk Utility.
4. In the list of drives in Disk Utility, select the ISO
5. Insert a blank CD into the SuperDrive
6. Click “Burn”
7. Ensure “Verify burned data” is checked
8. Once the burn is complete, shut down your Mac
9. Press and hold the Option key, and power Mac back on.
10. On the Startup Manager screen, wait for the firmware CD to appear. This may take a minute, or longer.
11. Click on the CD named “Windows” to highlight it, and then click the arrow just below the CD symbol to boot from the firmware CD.
12. Let the update utility run, following the steps on the screen to update your SSD firmware.


OS X 10.11 and later


1. Download the latest firmware here :

2. Insert a blank DVD or CD into the system

3. In Finder, click on the .iso to highlight it

4. Under the “File” menu choose “Burn Disk Image (name) to disc”

5. Once the burn is complete, shut down your Mac
6. Press and hold the Option key, and power Mac back on.
7. On the Startup Manager screen, wait for the firmware CD to appear. This may take a minute, or longer.
8. Click on the CD named “Windows” to highlight it, and then click the arrow just below the CD symbol to boot from the firmware CD.
9. Let the update utility run, following the steps on the screen to update your SSD firmware.



Once the firmware update has finished, use the power button to shut down and restart your Mac, and let it boot back up to your desktop.


Below is a video illustrating the process. The video uses an M500, but the process is the same for all Crucial 2.5" SSDs.




Kilobyte Kid

Hi I already install my SSD drive with the 040H update before I install it in my MacBook Pro now my main drive with SSD M4 and my Optibay with HDD my question is can I update my firmware using and external CD ROM or USB Flash Drive? need advice ASP Thanks


Moderator Moderator

This article should have the answer you are looking for: Can I update the SSD firmware from an external CD drive?


If you have further questions, and if it is urgent, I would strongly recommend that you contact Customer Support for assistance. Make you you select the correct link for your region.

Bit Baby

I also have a malfunctioning sdd that freezes my computer every hour and another 750gb drive in Optibay. So what is the solution for updating my ssd firmware on a mac?

Moderator Moderator

The easiest solution for you would probably be to temporarily put the SuperDrive back into your optibay to run the firmware update. If that is not an option, another method would be to temporarily move the SSD into a system that has an optical drive, run the update, and return the SSD to the original computer.

Bit Baby


you can update the firmware using an external DVD drive. I did it this way yesterday and the Unix System booted without any problems and made the firmware update. But it must support booting on OSX and it must be connected via USB (Firewire is not supported). 

Important is also that you have your keyboard connected via cable. 

Kilobyte Kid

So if the firmware installer works with an external USB DVD drive, shouldn't it also work with a USB flash drive?

Kilobyte Kid

I bought a M500 960GB with the MU02 firmware for my 27" iMac 2.93GHz Quad as the second internal disk.

I used Disk Utility on my iMac to an external hard drive with the Crucial SSD M500 in it to initialize to the proper and newest Mac OSX format.


After the SSD's install into the iMac using the iMac's second internal SATA cable I followed the MU03 Firmware download/burn procedure here and was able to get to the DOS screen on the iMac for the firmware update.

At the point where I needed to type 'yes' I could not use my USB keyboard, I tried another - no response.  I re-booted this burned disk using the 'Option' method a few times and gave up.


My solution was to startup into my Bootcamp/Win7 partition.  From there I downloaded the Win7 Firmware, followed the instructions and re-booted Bootcamp/Win7, it started the MU03 Firmware update, I typed 'yes' to begin and all went smoothly.

I am now typing this on the Crucial M500 960GB SSD in my iMac, using the latest MU03 Firmware and Mac OSX Maveriks.

It is very smooth and fast.


This method should work with any MacMini, MBP or iMac that has Bootcamp with either Win 7 or Win 8 installed.

Kilobyte Kid

Is there any way to update a Crucial M500 480GB SSD to firmware MU03 using a MacBook Pro Retina and the this M500 SSD in an external enclosure?  I use this drive in a USB3.0 case, not in my laptop.  I don't have a spare laptop for just firmware upgrades.. there must be some other way?



Moderator Moderator

At this time, there is unfortunately not a way to update the firmware on a Crucial SSD that is connected through a USB enclosure.

Kilobyte Kid


Kilobyte Kid

Is that possible to update the firmware on a Crutial SSD connected as internal second disk? My MacBook run with the OS on the other internal disk of course.

Community Manager Community Manager
Community Manager

Hi Prusten,


Thank you for contacting us today. The SSD would need to be installed internally (not via USB) and needs to be connected to the SATA port directly. Please let us know if you have any other questions or concerns about this process.

Kilobyte Kid

Thanks YogiH for your quick replay.

I've just read the guides (from, i think i will do the firmware update in windows (i have a bootcamp section on my OS drive) it seems easier in windows Smiley Happy.

Kilobyte Kid

Hi to everyone,


first of all sorry for my bad english. So let's go to the question.

I bought a M500 480GB SSD, to be installed on my Mac Pro 4.1, and precisely on the PCI card, Sonnet Tempo SSD.
Everything works great, fast boot, impressive speed, but ...
When I check the firmware version of my M500, I find that it is the MU02, so follow your instructions step by step and create a bootable CD with the sofware downloaded from your site, to upgrade to MU03..
I reboot my Mac Pro with the CD, the DOS program start, searching and spinning, but the program say that don't found any SSD, after a while remains only a blinking prompt A>:
Any suggestions would be appreciated Smiley Happy



EDIT:  Since no one answered me, I rolled up my sleeves and I found the solution by itself. After several attempts and failures related, I also tried to install my M500 into a USB external case...., only later I read in the forum that you can not do a firmware update via USB.

But this has opened my eyes, so I simply connected the M500, directly to the motherboard of the MacPro. 

Exactly, i used the third bay, which is free from any obstacle. The entire update operation lasted 4 minutes.

I have to say that the performances are much improved now, so thanks Crucial (and Sonnet).


Bit Baby

Thanks for the info and options.  I plan to put the M500 SSD into an Apricorn Velocity X2 pcie adaptor.  Can I update the SSD when it is installed in the adaptor or should I remove on of the HDDs and insert the SSD directly into the motherboard as suggested above?

Thanks in advance for any suggestions!

Moderator Moderator

Unfortunately the SSD needs to be connected directly to a SATA port in order for the firmware update to run properly. So yes, I would suggest Temporarily connecting the SSD directly to the motherboard for the update. After the firmware has been updated, you can move the SSD back to the adapter again.

Kilobyte Kid



sorry for the bad English at first, its not my native language.


There is a small problem with installing the update (mu05) on my mac.

I have burned a cd with het iso image, so that’s good.

When I boot the mac I goes great until I come to this screen, 


Schermafbeelding 2014-04-28 om 15.34.13.png

then my mac screen goes black the cd stops spinning and noting happens.

What can I do , to resolve this problem ?

Bit Baby

Crucial needs a "quick sheet" on what drives latest revisions are somewhere on the site. 


We have multiple drives in our office and being able to look at them in a glance would be very helpful..also people would not have to do searches through a knowledge base to find the direct current revision to a direct link to the current update.


An Excel spreadsheet on the site would be more efficient..than finding what the current Revision is for M4 SSD. I've wasted 10 min just looking for it.



Kilobyte Kid

Did not work.


I also tried creating an ISO bootable USB. While it was successful in creating the USB...the MacPro did not recognize it.


Unfortunately, Crucial has no soluiton for Mac users that need to upgrade their SSD Drives.


Try Samsung SSD drives.

Kilobyte Kid

Hi there,


I installed Crucial MX100 512gb SSD in my MacMini (late 2012 version).

I notice there is a new firmware (MU02) for MX100.

My Macmini does not have a CD-R drive.

Is it possible to update the SSD firmware by creating at USB boot drive? (PS: Sorry to ask this question as I am a total noob when i comes to SSD).

Also, it will be great if someone can point me to how to create the USB boot drive. (I did some research on the internet but the instructions somehow require me to go into Terminal. Is there a more straight forward way?).


Many thanks in advance for your help.


Best regards,


Crucial Employee
Crucial Employee

Hi Patrick,

Thanks for your comment.

Don’t worry about being a noob that’s why we are here to help.  I am sorry that you could not use the standard CD method to update the firmware on your Mac system.

I have looked in to all your comments and creating a bootable USB option would not work for a Mac system.

For Mac systems that do not have an optical drive we currently do not have a firmware update solution. This is not a compatibility issue with our product and Mac systems, rather it is an industry-wide challenge with how to update firmware on some Mac systems.

As the firmware is stored on the SSD itself, you can safely install it in a different system with an optical drive/SuperDrive and update it on that, then re-install it in your Mac.

I am sorry for any inconvenience and if you do have any other questions at all, please don’t hesitate to ask and I would be more than happy to help.

Kilobyte Kid

This could be much better, Crucial ... you DO have Mac users, and this procedure is a pain in the **bleep** ...


Why isn't there a Mac version from the useful Crucial® Storage Executive, Version 3.20 pls ?

Since Macs don't have DVD anymore, its impossible to upgrade the SSD Firmware without great effort like uninstalling the SSD from the portable or Mac Mini.


Macs don't have Superdrives anymore, so HOW can I upgrade my Crucial Firmware ???

And no, I won't buy a PC to do only this ...




Pls help !!!

Kilobyte Kid

When you sell SSD's to Mac users, you really SHOULD provide them with a valuable solution upgrading their Firmware.

I bought a brandnew MX200 1TB  SSD and yes, it has an old Firmware ...






Kilobyte Kid

Hi j_vh.  I just installed an MX200 SSD in my late 2012 Mac mini which does not have an internal DVD drive.  I successfully updated by firmware from MU03 to MU04 using an external Apple Superdrive connected through a USB connector.  I'm running El Capitan, so burning a CD from the .iso file is done from the Finder, not from Disk Utility.  After that, I was was able to boot from the CD in the external Apple Superdrive and it ran the upgrade with no problems.  Hope that helps.

Kilobyte Kid

just to clarify and help mac users with this confusing process-here's the step by step process for the cd firmware update process that i use for my 2011 macbook pro 17" with a mx200 500gb ssd. i installed  mu04 moments ago.


1. download the most recent update from crucial support for your drive ONLY (it will be in your downloads folder)


2. open the downloads folder in finder then double click the to unzip


3. select the resulting bootable_media_update.iso with one click only (do NOT open onto desktop) and use any of these options to "burn disk image" to a cd-

  • via Finder Menu > File > Burn disk Image "xxx" to disc, or
  • via control-click > Burn disk Image "xxx" to disc, or
  • via right-click, depending on mouse > Burn disk Image "xxx" to disc.

if you mistakenly opened the iso on the desktop you'll see it labeled as "StorageExecutive". DO NOT burn this to cd, only use the iso as instructed!


4. insert a cd and select burn, it will be ejected when finished.


5. shutdown and restart with firmware cd already in drive with option key pressed when the startup chime sounds (if you forgot to put in the cd you can insert the cd in the drive after power-on) 


6. select the “windows” drive to boot from, then click on the arrow below it. DOS will then load followed by the crucial storage executive which will then automatically load the update. when finished, it’s very quick, it will state “success- remove bootable media and press any key to continue”, ignore that and press the power button to shut off, then restart and eject the cd, you're done!

Kilobyte Kid

When are you going to understand Apple mothballed DVD and CD quite some time now ...

What we really need is a modern, up to date upgrade system for the SSD's to upgrade the firmware.


I mean a real Mac program, like the one that exists for Windows.

We don't need a thing that force us to use DVD/CD in 2016 !!



Kilobyte Kid

I just installed an MX300 in my late 2011 MBP.  How can I tell what firmware the drive is running?

Kilobyte Kid

hi LarryJoeMBP.

Here is how I find the firmware revision number:

in the "apple" menu, select "about this mac"

then click on "system report"

under the "hardware" menu, select "SATA"

select your drive

look for "revision" - probably the third line down in the report


Kilobyte Kid

Got it, thanks.  What is the latest firmare revision for the MX300?


Crucial Employee
Crucial Employee

Hi LarryJoeMBP,


Thank you for your question.


We have not had any firmware updates for the MX300 yet as it is a new drive.  You can check for updates using our Crucial Storage Executive software.  This is a free download on our website that allows you to manage your SSD. 


You can see it on our website here: 


We also have a firmware update thread on our forum which we post in anytime a new firmware is released.  You can see it here:


The first post in that thread also explains how to subscribe to the thread so you will get an email with any firmware updates.  If you do have any other questions at all, please don't hesitate to ask. 

Kilobyte Kid

is there any other " FRIENDLIER"  way to update CRUCIAL MX300 SSD firmware for Mac Os Sierra without burning cd?? like create bootable usb pendrive?? 1st because i threw away my combo drive to put this ssd... and 2nd i dont know how to use sorry....




It is possible to "burn" the firmware ISO to a USB flash drive, but the ISO first needs to be converted to a hybrid ISO which then supports CD & HD booting.  The only way I know how to do this is by using a Linux distribution and the  "isohybrid" tool which can be installed from the "syslinux-utils" package on Debian based distributions.   After running isohybrid on the ISO, you just need to "dd" it to the flash drive (which will erase all contents on the flash drive).


It should be possible to do this all on a Mac by creating a Live Knoppix Flash Drive and a spare USB Flash drive for the firmware, but you can also easily destroy your boot volume on the Mac's SSD if you issue the incorrect command.   This method should only be attempted by technical users or very brave/bold users as you can erase your boot drive if you are not careful.


It may be possible to "burn" the Crucial firmware image to a USB Flash Drive using an app such as UNetBootin (several other similiar apps available natively for OSX), but there are no guarantees with this method.  I've used this method for "burning" other bootable ISOs to a flash drive with mixed success as it can sometimes modify the boot process intended by the creator of the original ISO.   Use this at your own risk.


I have successfully used the "isohybrid"  method to create a bootable USB Flash Drive which worked on both PCs & Macs.  I've updated the m4, M500 & MX series (through the MX300) SATA SSDs without any problems.


For Linux users the above hints provide more than enough information to create a bootable firmware flash drive, and anyone else should probably find a Linux user to assist them, or just burn a CD.


Crucial,  your ISOs should be created as hybrid ISOs so that it is easy to "burn" it to a flash drive.   I've lost faith in 3rd party apps which do this so I dislike having to install the extra apps just to make a bootable firmware flash drive.  Then even your technical Apple users could just "dd" the ISO to a flash drive.


Kilobyte Kid

Any Mac from as early 2012 does NOT has a DVD/CD unit anymore !!!

Pls provide us with a decent solution to upgrade to the latest firmware !!


Its an issue for years now, Crucial pls please wake up !!!

Or maybe Mac users are not that important for you ???

Kilobyte Kid

Thought I'd report in to say that I upgraded the firmware successfully with a bit of guidance from pghbob and a few hits and misses.  I own a mid 2012 MBP/MacOS 10.13.6  with a new MX500 1 TB SSD and good for me that i did not disable the dvd drive.


I had trouble burning the iso to dvd until I slowed the burn speed to 2.4x Then it was successful.


I inserted the dvd, pressed Option, and booted. Selecting Windows did not work, so I rebooted and selected "EFI boot" and it ran Storage Executive and upgraded the firmware to M3CR03. All I had to do was exit and reboot. Mac's System Report confirmed the upgrade.


Now that I know, it won't be a problem next time.


Thanks all!



Kilobyte Kid

8. Click on the CD named “Windows” to highlight it, and then click the arrow just below the CD symbol to boot from the firmware CD.
9. Let the update utility run, following the steps on the screen to update your SSD firmware.


On a 2010 MacBook Pro running OS X El Capitan, this did not work. Using the "Windows" CD resulted in a Unix routine that would not go anywhere because something was missing--presumably because it was looking for a Windows component that would not be present on a Mac..


I restarted my MBP. When the two CDs showed up next to the drive icon, I selected the one marked "EFI  Boot" instead. After a mysterious message (Welcome to GRUB!) followed by a screen with a couple of "Tiny [something]" logos on it, it went to a third screen, which started a Storage Executive routine that took a few minutes but installed the upgrade without any further action on my part (other than pressing "any key" when instructed to at the completion of the update.



Kilobyte Kid

Also, I had no problem installing the update from an external CD/DVD drive.