For Macs that were sold with OS X It's not uncommon for the optical media or USB flash drive to become misplaced over time. And of course, you won't notice that they're missing until you need them. If you find yourself in this situation, you have two basic choices. You can give Apple a call and order a replacement disk set. You'll need your Mac's serial number; here's how to find it:.
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Once you have the serial number, you can call Apple support at APL-CARE or use the online support system to initiate a request for replacement media. They should be able to run the AHT for you, as well as help diagnose any issues you're having. Once you finish using the Apple Hardware Test, you can quit the test by clicking either the Restart or Shut Down button. The error codes generated by the Apple Hardware Test tend to be cryptic at best, and are meant for Apple service technicians. Many of the error codes have become well known, however, and the following list should be helpful:.
Most of the above error codes indicate a failure of the related component and may require having a technician look at your Mac, to determine the cause and the cost for a repair. This can be helpful for some errors, including logic board and fan problems. You can perform additional troubleshooting for memory RAM , hard disk , and external disk problems.
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In the case of a drive, whether internal or external, you can try to repair it using Disk Utility which is included with OS X , or a third-party app, such as Drive Genius. If you still have memory issues, you may need to replace the RAM. Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. From the Apple menu, select About This Mac. Shut down your Mac, if it's on.
If you're testing a Mac portable, be sure to connect it to an AC power source. Do not run the test from the Mac's battery. Press the power button to start your Mac. Immediately hold down the D key. Be sure the D key is pressed before a gray screen appears. If the gray screen beats you to the punch, wait for your Mac to start up, then shut it down and repeat the process. Continue to hold the D key until you see a small icon of a Mac on your display.
Once you see the icon, you can release the D key. A list of languages that can be used to run the AHT will appear. The Apple Hardware Test will check to see what hardware is installed in your Mac. You may need to wait for a bit for the hardware probe to complete. Once it's complete, the Test button will be highlighted. Before you press the Test button, you can check what hardware the test found by clicking on the Hardware Profile tab. Look through the list of components to ensure that your Mac's major components are showing up correctly.
If anything appears to be wrong, you should verify what your Mac's configuration should be. Locate InstallESD. The same steps are valid for Mountain Lion and Mavericks. If your Mac runs macOS Sierra Instruction to downgrade from macOS Catalina.
Mac OS X (Mac) - Download
Before you do it, the best advice is to back your Mac up so your most important files stay intact. In addition to that, it makes sense to clean up your Mac from old system junk files and application leftovers. The easiest way to do it is to run CleanMyMac X on your machine download it for free here.
They should have image installations going back to OS Leopard and earlier. You can also ask their assistance to create a bootable USB drive with the installation file.
So here you are. We hope this article has helped you to download an old version of Mac OS X.
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- STEP 1. Prepare your Mac for installation.
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Download and install older versions of OS X on a Mac
Download and install older versions of OS X on a Mac. Igor Degtiarenko.
Writer and blogger at MacPaw, curious just about everything. Did you enjoy this post? Subscribe Now.
November 29, Updated: May 10, CleanMyMac X. Free Download.
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