You’re hitting an expired certificate issue! Here’s more on it [https://appleinsider.com/articles/19/10/24/if-youve-got-an-old-macos-install-image-it-will-probably-stop-working-today|If you've got an old macOS install image, it will probably stop working today]
Apple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s. 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.
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. Here’s the updated installers:
+
* [https://support.apple.com/en-us/HT206886|How to upgrade to OS X El Capitan]
* [https://support.apple.com/en-us/HT208202|How to upgrade to macOS Sierra]
* [https://support.apple.com/en-us/HT208969|How to upgrade to macOS High Sierra]
* [https://support.apple.com/en-us/HT210190|How to upgrade to macOS Mojave]
In all of these just jump down to '''Step 4''' to get to the URL link for the OS image.
Apple did not alter the older images in their downloads. Some Internet recovery images likewise have not been updated.
'''OK, What about the older ones!'''
Not to fear! You can still install the OS. 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. 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.
You’re hitting an expired certificate issue! Here’s more on it [https://appleinsider.com/articles/19/10/24/if-youve-got-an-old-macos-install-image-it-will-probably-stop-working-today|If you've got an old macOS install image, it will probably stop working today]
Apple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s. 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.
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. Here’s the updated installers:
* [https://support.apple.com/en-us/HT208202|How to upgrade to macOS Sierra]
* [https://support.apple.com/en-us/HT208969|How to upgrade to macOS High Sierra]
* [https://support.apple.com/en-us/HT210190|How to upgrade to macOS Mojave]
In all of these just jump down to '''Step 4''' to get to the URL link for the OS image.
Apple did not alter the older images in their downloads. Some Internet recovery images likewise have not been updated.
'''OK, What about the older ones!'''
-
Not to fear! You can still install the OS. The trick is bad 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. 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.
+
Not to fear! You can still install the OS. 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. 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.
You’re hitting an expired certificate issue! Here’s more on it [https://appleinsider.com/articles/19/10/24/if-youve-got-an-old-macos-install-image-it-will-probably-stop-working-today|If you've got an old macOS install image, it will probably stop working today]
Apple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s. 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.
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. Here’s the updated installers:
-
[https://support.apple.com/en-us/HT208202|How to upgrade to macOS Sierra]
-
-
[https://support.apple.com/en-us/HT208969|How to upgrade to macOS High Sierra]
-
-
[https://support.apple.com/en-us/HT210190|How to upgrade to macOS Mojave]
-
+
* [https://support.apple.com/en-us/HT208202|How to upgrade to macOS Sierra]
+
* [https://support.apple.com/en-us/HT208969|How to upgrade to macOS High Sierra]
+
* [https://support.apple.com/en-us/HT210190|How to upgrade to macOS Mojave]
In all of these just jump down to '''Step 4''' to get to the URL link for the OS image.
Apple did not alter the older images in their downloads. Some Internet recovery images likewise have not been updated.
'''OK, What about the older ones!'''
Not to fear! You can still install the OS. The trick is bad 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. 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.
You’re hitting an expired certificate issue! Here’s more on it [https://appleinsider.com/articles/19/10/24/if-youve-got-an-old-macos-install-image-it-will-probably-stop-working-today|If you've got an old macOS install image, it will probably stop working today]
Apple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s. 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.
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. Here’s the updated installers:
[https://support.apple.com/en-us/HT208202|How to upgrade to macOS Sierra]
[https://support.apple.com/en-us/HT208969|How to upgrade to macOS High Sierra]
[https://support.apple.com/en-us/HT210190|How to upgrade to macOS Mojave]
In all of these just jump down to '''Step 4''' to get to the URL link for the OS image.
Apple did not alter the older images in their downloads. Some Internet recovery images likewise have not been updated.
'''OK, What about the older ones!'''
Not to fear! You can still install the OS. The trick is bad 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. 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.
[image|1921047]