![]() (I'm not sure, but possibly Sierra is the oldest system not to have an expired certificate.) If you install this you may be able to access the Catalina installer, but I have a nasty feeling that you might still be stuck with the expired certificate and be back where you started: probably worth a try. However, according again to that help page, you can download macOS Sierra 10.12 installer, which comes as a direct link to a disk image and which, oddly, is http not https. So basically you cannot install the upgrade until you have installed the upgrade. Firefox can access https sites as it uses its own certificate, but it cannot open these links (which need to open the Mac App Store). (secure) Safari on your Mac cannot access https sites because the security certificate has expired. Then you can install macOS Catalina 10.15 ![]() According to you have to first install macOS Mojave 10.14.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |