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SoftRAID and MAC OS X version compatibility chart

SoftRAID versions compatibility with OS X releases                                                                                    

Please note: If the older version of SoftRAID you are using is not supported by your Mac OS, you will need to upgrade to the SoftRAID version 5. Please purchase an upgrade here.

macOS Sierra 10.12 – Compatibility Info

  • SoftRAID version 5.5.6 is fully compatible with macOS Sierra 10.12

    SoftRAID version 5.5.6 has been extensively tested and is fully compatible with macOS Sierra 10.12. All of the features you love in SoftRAID work with this new release.

    SoftRAID application icon picture of OWC ThunderBay IV
  • Upgrade to latest SoftRAID version:

  • Installing macOS Sierra 10.12 onto a SoftRAID volume

    The macOS Installer for macOS Sierra 10.12 recognizes all SoftRAID volumes as bootable. You can use the macOS Installer to upgrade or install macOS onto any SoftRAID volume.

  • Using TRIM on non-Apple SSDs

    All SoftRAID volumes fully support TRIM on Apple and non-Apple SSDs. If you are using SSDs and wish to enable TRIM for non-Apple SSDs, you must instruct macOS that it is safe to use TRIM on your SSDs.

    If you are running Mac OS X 10.10.4 or later, you can use the trimforce command in a Terminal window to enable TRIM on these SSDs. For a more detailed description of TRIM on Mac OS X, please see the ArsTechnica article.

macOS Sierra 10.12 – Compatibility Issues

  • Why do my SoftRAID volume icons show a red exclamation mark after upgrading to macOS Sierra 10.12?

    Grey SoftRAID application icons

    Have you just upgraded to macOS Sierra 10.12 and all your SoftRAID volume icons look like the one shown here; grey with a red exclamation mark?

    This is SoftRAID's way of telling you that your disks and volumes are not fully protected because you are running a limited version of the SoftRAID driver which lacks many features (i.e. it lacks: disk failure detection and prediction, volume rebuilds, all user notifications and error logging). The macOS Sierra 10.12 Installer overwrites any existing copy of the SoftRAID driver with this limited version as part of the macOS installation process.

    To restore the full set of SoftRAID features, just run SoftRAID version 5.5.6 to update the driver. This will restore the full set of SoftRAID features.

  • SoftRAID versions 5.0.2—5.0.7 not fully compatible with macOS Sierra 10.12

    Earlier versions of SoftRAID version 5 (5.0.2 - 5.0.7) are not compatible with macOS Sierra 10.12. While your volumes will mount, you may have problems running the SoftRAID application. This incompatibility is the result of stronger security restrictions which Apple introduced in Mac OS X 10.11 El Capitan.

    To ensure SoftRAID runs smoothly with macOS Sierra, download the latest version on our download page.

  • SoftRAID version 4 does not support macOS Sierra 10.12

    SoftRAID version 4 will not work with macOS Sierra 10.12 (or any OS later than 10.10). Apple has made significant changes to the Mac's operating system since version 4 was first released in 2009. These changes prevent parts of SoftRAID version 4 from working correctly.

    Make sure you upgrade to SoftRAID version 5 before installing Mac OS X 10.11 Yosemite.

Mac OS X 10.11 El Capitan – Compatibility Info

  • SoftRAID version 5.5.6 is fully compatible with Mac OS X 10.11 El Capitan

    SoftRAID version 5.5.6 has been extensively tested and is fully compatible with Mac OS X 10.11 El Capitan. All of the features you love in SoftRAID work with this new release.

    SoftRAID application icon picture of OWC ThunderBay IV
  • Upgrade to latest SoftRAID version:

  • Installing Mac OS X 10.11 El Capitan onto a SoftRAID volume

    The Mac OS X Installer for Mac OS X 10.11 recognizes all SoftRAID volumes as bootable. You can use the Mac OS X Installer to upgrade or install Mac OS X onto any SoftRAID volume.

  • Using TRIM on non-Apple SSDs

    All SoftRAID volumes fully support TRIM on Apple and non-Apple SSDs. If you are using SSDs and wish to enable TRIM for non-Apple SSDs, you must instruct Mac OS X that it is safe to use TRIM on your SSDs.

    If you are running Mac OS X 10.10.4 or later, you can use the trimforce command in a Terminal window to enable TRIM on these SSDs. For a more detailed description of TRIM on Mac OS X, please see the ArsTechnica article.

Mac OS X 10.11 El Capitan – Compatibility Issues

  • Why are my SoftRAID volume icons grey after upgrading to Mac OS X 10.11 El Capitan?

    Have you just upgraded to Mac OS X 10.11 and all your SoftRAID volume icons are now grey?

    Grey SoftRAID application icons

    This is SoftRAID's way of telling you that your disks and volumes are not fully protected. You are running a limited version of the SoftRAID driver which lacks many features (i.e. it lacks: disk failure detection and prediction, volume rebuilds, all user notifications and error logging). The Mac OS X 10.11 El Capitan Installer overwrites any existing copy of the SoftRAID driver with this limited version as part of the Mac OS X installation process.

    To restore the full set of SoftRAID features, just run SoftRAID version 5.5 or later to update the driver. This will restore the full set of SoftRAID features.

  • SoftRAID versions 5.0.2—5.0.7 not fully compatible with Mac OS X 10.11 El Capitan

    Earlier versions of SoftRAID version 5 (5.0.2 - 5.0.7) are not fully compatible with Mac OS X 10.11. While your volumes will mount, you may have problems running the SoftRAID application. This incompatibility is the result of stronger security restrictions which Apple introduced with this new version of Mac OS X.

    This is fixed in SoftRAID version 5.5 and later. Find the latest version on our download page.

  • SoftRAID version 4 does not support Mac OS X 10.11 El Capitan

    SoftRAID version 4 will not work with Mac OS X 10.11 El Capitan (or any OS X later than 10.10). Apple has made significant changes to the Mac OS X since version 4 was first released in 2009. These changes prevent parts of SoftRAID version 4 from working correctly.

    Make sure you upgrade to SoftRAID version 5 before installing Mac OS X 10.11 Yosemite.

MAC OS X and SoftRAID: General compatibility info

  • SoftRAID volumes are compatible with OS X Recovery Mode

    All Macs which first shipped after October 2010 are able to startup in Recovery Mode and access SoftRAID volumes. This enables you to check your SoftRAID volumes using Disk Utility or reinstall Mac OS X even if your startup volume is a SoftRAID volume.

    To use Recover Mode, connect your Mac to the internet, restart your Mac and hold down the Command key and the R key (Command-R). Your Mac will load the recovery system over the internet and then start up in Recovery Mode.

  • Using TRIM on non-Apple SSDs

    All SoftRAID volumes fully support TRIM on Apple and non-Apple SSDs. If you are using SSDs and wish to enable TRIM for non-Apple SSDs, you must instruct Mac OS X that it is safe to use TRIM on your SSDs.

    If you are running Mac OS X 10.10.4 or later, you can use the trimforce command in a Terminal window to enable TRIM on these SSDs. For a more detailed description of TRIM on Mac OS X, please see the ArsTechnica article.

Mac OS X 10.10 Yosemite – Compatibility Info

  • SoftRAID version 5 is fully compatible with Mac OS X 10.10 Yosemite

    SoftRAID version 5 has been extensively tested with Mac OS X 10.10 Yosemite. All of the features you love in SoftRAID will continue to work after you upgrade.

  • Installing Mac OS X 10.10 Yosemite onto a SoftRAID volume

    The Mac OS X Installer for Mac OS X 10.10 recognizes all SoftRAID volumes as bootable. You can use the Mac OS X Installer to upgrade or install Mac OS X on a SoftRAID volume. This works with all RAID levels.

Mac OS X 10.10 Yosemite – Compatibility Issues

  • SoftRAID version 4 does not support Mac OS X 10.10 Yosemite

    SoftRAID version 4 will not work with Mac OS X 10.10 Yosemite (or any OS X later than 10.10). Apple has made significant changes to the Mac OS X since version 4 was first released in 2009. These changes prevent parts of SoftRAID version 4 from working correctly.

    Make sure you upgrade to SoftRAID version 5 before installing Mac OS X 10.10 Yosemite.

  • SoftRAID volumes not showing up when running OS X 10.10 Yosemite

    Mac OS X 10.10 Yosemite requires all drivers to be code signed, a cryptographic process which detects modification of a driver. When running Yosemite, if a driver has been modified, the OS refuses to load it. You can find a fix for this here: Getting SoftRAID volumes to appear on Mac OS X 10.10 Yosemite.

  • Mac won't boot up from SoftRAID startup volume running OS X 10.10 Yosemite

    This is another issue stemming from Mac OS X 10.10 Yosemite requiring all drivers to be code signed (see immediately above). When running Yosemite, if a driver has been modified, you may no longer be able to boot your Mac if your start volume is a SoftRAID volume. You can find a fix for this here: Fixing a Mac which no longer starts up from a SoftRAID volume with Mac OS X 10.10 Yosemite.

Mac OS X 10.9 and 10.8 – Compatibility Issues

Issues using SoftRAID on older versions of MAC OS X

There are few bugs in Mac OS X 10.8 and 10.9 which affect SoftRAID volumes. Solutions to these problems appear below.

SOLUTIONS TO ISSUES with MAC OS X 10.10 Yosemite

Getting SoftRAID volumes to appear on Mac OS X 10.10 Yosemite

If your SoftRAID volumes are not appearing, the most likely cause is that the SoftRAID driver on your Mac has been modified by the OS or a third party utility.

To fix this problem, follow the steps below to download and install a fresh copy of the SoftRAID application. After installing the new driver copy, your volumes will appear.

Why a fresh copy? Sometimes the SoftRAID driver gets modified, even when it is inside the SoftRAID applicaton. Downloading a fresh copy ensures that you are starting with a unmodified copy of the driver.

For more information on what may have caused your SoftRAID driver to be modified, please read the relevant FAQ.

Steps to get missing volumes to appear:

  1. Download a new copy of SoftRAID

    Before you start, you should download new copy SoftRAID. This ensures that the driver in your SoftRAID application had not been modified. (Some third party utilities modify the copy of the driver in the SoftRAID application each time you run them).
  2. Copy the SoftRAID application to your Applications folder

    After downloading the latest copy of SoftRAID from our web site, copy the SoftRAID application to your Applications folder. You should delete all other copies of the SoftRAID application in your Applications folder to avoid confusion.
  3. Double click the SoftRAID application to launch it

    Select Applications from the Go menu to display the contents of your Applications folder. Double click on the SoftRAID application to launch it.
  4. Select the tile for your startup volume

    Go to the list of volumes on the right side of the main window and click once on the tile which corresponds to your startup volume. It will have contain the text "(Mac OS X 10.10 startup)" in the top line of the tile.
  5. Select Reinstall SoftRAID driver... from the Volume menu

    This will install a fresh, unmodified copy of the SoftRAID driver in your system.
  6. Quit SoftRAID

  7. Restart your Mac

  8. Your SoftRAID volumes will now appear

Fixing a Mac which no longer starts up from a SoftRAID volume with Mac OS X 10.10 Yosemite

If your Mac no longer starts up from a SoftRAID volume, the most likely cause is that the SoftRAID driver on your Mac has been modified by the OS or a third party utility. If you install a new, unmodified, copy of the SoftRAID driver onto this volume, your Mac will be able to startup normally.

You will need to have a second startup volume to fix your original SoftRAID startup volume. This startup volume must contain Mac OS X 10.10 Yosemite.

For more information on what may have caused your SoftRAID driver to be modified, please read the relevant FAQ.

Steps to fixing OS X 10.10 startup issue:

  1. Turn your computer off

    Make sure your Mac is turned off, before you continue.
  2. Attach a extra disk which contains a startup volume with Mac OS X 10.10 Yosemite

    Attach a second disk with a volume containing Mac OS X 10.10 Yosemite. If you don't have one, you can create one using any disk, even a USB thumb drive (it must be at least 16 GB in size). Just follow the Mac OS X 10.10 Yosemite installation instructions on the Apple web site.
  3. Startup your Mac from the volume on the extra disk

    Immediately after pressing the power button, hold down the Option key. This will give you a list of volumes you can start your Mac with. Select the startup volume on your external disk which contains Mac OS X 10.10 Yosemite.
    Note: If you are using an Apple Wireless Keyboard, you will have to wait until right after the startup chime before you hold down the Option key. If you hold it down too early, you will not see the list of available startup volumes.
  4. Download a new copy of SoftRAID

    You should download a new copy SoftRAID. This ensures that the driver in your SoftRAID application had not been modified. (Some third party utilities modify the copy of the driver in the SoftRAID application each time you run them).
  5. Copy the SoftRAID application to your Applications folder

    After downloading the latest copy of SoftRAID from our web site, copy the SoftRAID application to your Applications folder. You should delete all other copies of the SoftRAID application in your Applications folder to avoid confusion.
  6. Double click the SoftRAID application to launch it

    Select Applications from the Go menu to display the contents of your Applications folder. Double click on the SoftRAID application to launch it.
  7. Select the tile for your SoftRAID startup volume

    Go to the list of volumes on the right side of the main window and click once on the tile which corresponds to your original startup volume, the one which no longer works. It will have contain the text "(Mac OS X 10.10)" in the top line of the tile.
  8. Select Reinstall SoftRAID driver... from the Volume menu

    This will install a fresh, unmodified copy of the SoftRAID driver in your system.
  9. Quit SoftRAID

  10. Select System Preferences... under the Apple menu

  11. Select the Startup Disk item in the System Preferences

  12. Select your SoftRAID volume in the list of available startup volumes

  13. Click the Restart button

  14. Your Mac will now startup from your SoftRAID volume

SOLUTIONS TO ISSUES with MAC OS X 10.9 Mavericks

Installing Mac OS X 10.9 onto a SoftRAID volume

The process of installing Mavericks onto a SoftRAID volume is made more complicated by a bug in the Mavericks Installer. If you follow these steps, you will avoid this bug and be able to install Mavericks successfully.

NOTE: You will need to have a second hard disk or USB flash disk with at least 8 GB of free space. It must be formatted with Apple's Disk Utility program and not SoftRAID.

Steps to fix Mavericks installation problem:

  1. Upgrade to the latest version of SoftRAID

    Before you start, you should download and install SoftRAID the latest version of SoftRAID. You will need the latest version once you are running Mavericks so you should download it first. Once you have downloaded it, you should drag the SoftRAID application to your Applications folder and launch it. This will update the driver on your startup volume to the latest version.
  2. Attach a second disk or USB flash disk with at least 8 GB of free space

    You will need to attach a second hard disk or USB flash disk. This disk does not need to be a startup volume. It can be any disk with a HFS volume as long as the volume has at least 8 GB of free space. If you are attaching a blank disk or one with any volume type other than HFS, you can use Apple's Disk Utility application to partition the disk and create an HFS volume on it.
    Note about USB flash disks: If you are using a USB flash disk, make sure it is fast enough and can reliably read and write data. Some of the less expensive USB flash disks can only read and write data at 5 MB/sec and can be very unreliable. You should be using a USB flash disk which supports read and write speeds of at least 15 MB/sec made by a reputable manufacturer. If you have any doubts about your USB flash disk, you can certify it with SoftRAID first.
  3. Go to the App Store and download the Mavericks Installer

    Go to the App Store and download the Install OS X Mavericks application. This can take one to several hours. At the end of the download process, the Mavericks Installer will be started automatically.
  4. Copy the Mavericks installer to a volume on the second disk or USB flash disk

    Open the Applications folder on your startup volume and copy the Install OS X Mavericks application to the volume on your second disk.
  5. Quit the Mavericks Installer

  6. Double click on the Mavericks Installer located on this second disk

  7. Wait for the installation process to complete

  8. Run the latest version of SoftRAID again to update the driver and reinstall the SoftRAID Monitor

Fixing a Mac which will no longer startup after installing Mac OS X 10.9

The Mavericks Installer can put your Mac in a state where it is no longer able to startup. This is caused by a bug in the Apple's installation code. It can be fixed relatively easily by following the following steps.

You will need to have a second hard disk containing a valid startup volume or be able to connect to a second computer in Target Disk Mode.

Steps for using a second disk which contains a startup volume:

  1. Hold the power button down on your Mac for 4 seconds until it turns itself off

  2. Attach the second disk which contains a startup volume

  3. Press the power button once to start up your Mac and immediately hold down the Option key

  4. Use the mouse or the right and left arrow keys to select the volume on the disk you just attached

  5. Type the Return key to start the boot process

  6. Once your Mac has started up, go to the Utilities folder and open the Disk Utility application

  7. Select the volume you were trying to install Mavericks onto and then click the Repair Disk button

  8. Once the "repair disk" operation has completed, shutdown your Mac and disconnect the second disk

Your Mac will now be repaired and able to startup normally. If you want to install Mavericks, please follow the instructions at the top of this page to avoid the bug in the Mavericks Installer application

Steps for using a second Mac and Target Disk Mode:

  1. Hold the power button down on the Mac which needs repair for 5-10 seconds until it turns itself off

  2. Shutdown your second Mac

  3. Press the power button once on the Mac which needs repair and immediately hold down the T key

  4. Wait for the large FireWire or Thunderbolt icon to appear on the screen indicating that the Mac has entered Target Disk Mode

  5. Connect the Mac which needs repair to the second Mac using a FireWire or Thunderbolt cable

  6. Press the power button once on the second Mac to start it up

  7. Once the second Mac has started up, go to the Utilities folder and open the Disk Utility application

  8. In Disk Utility, select the volume on the Mac which needs repairing and then click the Repair Disk button

  9. Once the Repair Disk operation has completed, shutdown the second Mac

  10. Hold the power button down on the repaired Mac for 5-10 seconds until it turns itself off

  11. Disconnect FireWire or Thunderbolt cable

Your Mac will now be repaired and able to startup normally. If you want to install Mavericks, please follow the instructions at the top of this page to avoid the bug in the Mavericks Installer application

SOLUTIONS TO ISSUES with MAC OS X 10.8 Mountain Lion

Using SoftRAID with Mac OS X 10.8 on a Mac made in 2012 or later

When you install Mac OS X 10.8, Apple's Installer program copies an older version of the SoftRAID driver onto the new startup volume. Unfortunately, this older driver is not compatible with some Macs made after mid-2012.

Data corruption can occur if you use this older SoftRAID driver on some Macs made after mid-2012.

We fixed this bug within weeks of the affected Macs starting to ship. You can avoid this bug by simply updating your copy of SoftRAID to the latest version before attaching any disks which contain SoftRAID volumes.

If you are using Mac OS X 10.8, please install and run the latest version of SoftRAID before attaching disks which contain SoftRAID volumes.