If you’re trying to install point releases (patch updates in between major software versions), try downloading the Combo Update of the software version you want.
Then select the update you want to download. Finally, try downloading the update again.ĭownload the Mac Update from Apple’s Website. Release the Shift key when you see the Apple logo appear on your screen. Immediately press and hold down the Shift key on your keyboard. Then press the power button to turn your Mac back on. Once your Mac turns off, wait for 10 seconds. Click Shut Down on the dialog box that appears. It might take a long time for your computer to restart. You can also click More info to see what changes will be made with the update and if there are any system requirements, such as how much storage space you need to update your Mac. Note: If you want to install future updates automatically, check the box next to Automatically keep my Mac up to date. To find out how fast your WiFi connection is, check out our guide on how to test your WiFi speed. However, this is usually not very accurate, and it could take a long time, depending on your internet speed. You will see a countdown clock with the estimated time it will take to download the update in the window. It might take a while for the progress wheel to stop spinning as your computer searches for an update. Wait for your Mac to check for available updates. If an update is available, you might see a red badge icon in the top-right corner of the gear icon. Next, select Software Update.This is the menu option with the gear icon. If an update is available, you might see a notification in the drop-down menu. Click the Apple logo in the top-left corner of your screen. Once the update is finished downloading, click Download and Restart. Wait for your computer to find the update and click Update Now. Then go to System Preferences > Software Update. So they are expired so we need to find away around that with your Lion install (the version of Sierra I linked to above has a newer certificate).To update your Mac, click the Apple logo in the top-left corner of your screen. We still have one more issue! Apple has long since stopped maintaining the installer certificates. Or, you’ll need to prep up a OS installer USB Thumb drive using another Mac system following this guide: How to make a bootable Lion install disc or drive If you really need to stick with Lion you’ll need to get the original install CD and a CD player which works with your system. 
Use it to install the OS on your MacBook Air.īut you’ll need to worry about some of your older apps won’t run under Sierra or newer macOS’s.
You need to install a newer version of OS-X (macOS) I would recommend going with Sierra (10.12.x) and stopping there.ĭownload this OS installer How to upgrade to macOS Sierra on another Mac system and follow this guide: How to create a bootable macOS Sierra installer drive.
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