You can pick up an install disk at an Apple Store or order it online. Now your older OS installer thumb drives will work! Just remember to re-set the Date back to the correct year and set it back to auto. With the release of the OS X Lion operating system for Mac computers, Apple ceased.
The trick is back dating the systems clock! Alter the Date & Time setting from auto set to manual and then alter the date to a year that is within the given OS’s release window. Not to fear! You can still install the OS. Some Internet recovery images likewise have not been updated. Choose Mac OS Extended (Journaled) on the left. Go to the Partition tab and select 1 Partition from the dropdown menu. In all of these just jump down to Step 4 to get to the URL link for the OS image.Īpple did not alter the older images in their downloads. If you want to burn Lion to a USB flash drive, plug it in and click on it in the left-hand sidebar in Disk Utility. First of all, Restart your Mac and then immediately press and hold down the COMMAND and R keys together. The issue you face with the newer macOS’s is Apple didn’t update the certificate which is why this has become more of an issue as of late.
#Create mac os x lion install disk how to
As an example I had to re-install Lion for someone as they just didn’t want anything newer (90 year old lady) who just didn’t want to relearn how to do things or have the will to update her apps. You’re hitting an expired certificate issue! Here’s more on it If you've got an old macOS install image, it will probably stop working todayĪpple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s.
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