(Note: You will see an option in the menu to burn the item to disc, but do not use this as it will only burn the item as-is and the resulting disc will not be bootable.) Right-click the installer and choose Show Package Contents. Go to the Applications folder and locate the Install Mac OS X Lion package.Īt this point you can either create the installation disc, or you can copy the installer to a backup location so you can create the installation disc at a later point. When downloaded it will be added to your Dock and Applications folder, but do not proceed with the installation and instead quit the store and close the installer if it has automatically opened. Purchase and download Lion from the Mac App Store. 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.After choosing Show Package Contents on the installer, navigate to this folder to locate the InstallESD.dmg image that contains the Lion installation (click for larger view). 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. 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. 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. 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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