Free Disk Diagnostic Software Mac

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If your Mac is from 2012 or earlier and has OS X 10.8.3 or earlier, use the system software disc or USB flash drive that came with your Mac. Use Apple Diagnostics Print these instructions: Click the Share button in the Help window, then choose Print.

After isolating an issue on your Mac to a possible hardware issue, you can use Apple Diagnostics to help determine which hardware component might be causing the issue. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.

  • Disk Warrior is the most advanced repair and recovery tool for the mac users and allows you to restore your data from a single click. The tool is amazingly easy to use and very reliable. With this software, you will be able to get back up to what you were working on fast. Hardware Diagnostic Software for Android – Phone Tester (hardware info).
  • Download Seagate Diagnostics 1.0 for Mac from our software library for free. The application's installer is commonly called seagatediagmac.dmg. The program lies within System Tools, more precisely General. The unique ID for this application's bundle is com.seagate.seagatediagnostics.

If your Mac was introduced before June 2013, it uses Apple Hardware Test instead.

How to use Apple Diagnostics

  1. Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
  2. Make sure that your Mac is on a hard, flat, stable surface with good ventilation.
  3. Shut down your Mac.
  4. Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, it displays a progress bar indicating that it's checking your Mac:
  5. Checking your Mac takes 2 or 3 minutes. If any issues are found, Apple Diagnostics suggests solutions and provides reference codes. Note the reference codes before continuing.
  6. Choose from these options:
    • To repeat the test, click ”Run the test again” or press Command (⌘)-R.
    • For more information, including details about your service and support options, click ”Get started” or press Command-G.
    • To restart your Mac, click Restart or press R.
    • To shut down, click Shut Down or press S.
Diagnostic

If you choose to get more information, your Mac starts up from macOS Recovery and displays a web page asking you to choose your country or region. Click ”Agree to send” to send your serial number and reference codes to Apple. Then follow the onscreen service and support instructions. When you're done, you can choose Restart or Shut Down from the Apple menu.

This step requires an Internet connection. If you're not connected to the Internet, you'll see a page describing how to get connected.

Learn more

If holding down the D key at startup doesn't start Apple Diagnostics:

  • If you're using a firmware password, turn it off. You can turn it on again after using Apple Diagnostics.
  • Hold down Option-D at startup to attempt to start Apple Diagnostics over the Internet.

OnyX


OnyX is a multifunction utility that you can use to verify the structure of the system files, to run miscellaneous maintenance and cleaning tasks, to configure parameters in the Finder, Dock, Safari, and some Apple applications, to delete caches, to remove certain problematic folders and files, to rebuild various databases and indexes, and more.
OnyX is a reliable application which provides a clean interface to many tasks that would otherwise require complex commands to be typed using a command-line interface.
WARNING:
There is a specific version of OnyX for each major version of the operating system.
Use the specific version, and don't try to use a non-compatible version.

Learn more about OnyX and macOS Big Sur...

OnyX 3.8.4 for macOS Catalina 10.15

Requirements: Mac Intel computer running macOS Catalina 10.15.

OnyX 3.6.8 for macOS Mojave 10.14

Requirements: Mac Intel computer running macOS Mojave 10.14.

OnyX 3.4.9 for macOS High Sierra 10.13

Requirements: Mac Intel computer running macOS High Sierra 10.13.

OnyX 3.3.1 for macOS Sierra 10.12

Requirements: Mac Intel computer running macOS Sierra 10.12.

Microsoft Disk Diagnostic

OnyX 3.1.9 for OS X El Capitan 10.11

Requirements: Mac Intel computer running OS X El Capitan 10.11.

OnyX 3.0.2 for OS X Yosemite 10.10

Requirements: Mac Intel computer running OS X Yosemite 10.10.

OnyX 2.8.9 for OS X Mavericks 10.9

Requirements: Mac Intel computer running OS X Mavericks 10.9.

OnyX 2.7.4 for OS X Mountain Lion 10.8

Requirements: Mac Intel computer running OS X Mountain Lion 10.8.

Free Disk Recovery Software Download

OnyX 2.4.8 for OS X Lion 10.7

Requirements: Mac Intel computer running OS X Lion 10.7.

Free Disk Diagnostic Software Mac Free

OnyX 2.4.0 for Mac OS X Snow Leopard 10.6

Free Disk Diagnostic Software Mac Download

Requirements: Mac Intel computer running Mac OS X Snow Leopard 10.6.

OnyX 2.0.6 for Mac OS X Leopard 10.5

Requirements: Mac PowerPC or Intel computer running Mac OS X Leopard 10.5. OnyX only runs from an administrator account.

OnyX 1.8.6 for Mac OS X Tiger 10.4

Requirements: Mac PowerPC or Intel computer running Mac OS X Tiger 10.4. OnyX only runs from an administrator account.

OnyX 1.5.3 for Mac OS X Panther 10.3

Requirements: Mac computer running Mac OS X Panther 10.3 with BSD subsystem. OnyX only runs from an administrator account.

OnyX 1.3.1 for Mac OS X Jaguar 10.2

Requirements: Mac computer running Mac OS X Jaguar 10.2 with BSD subsystem. OnyX only runs from an administrator account.