Are you able to update your operating system any further? Older operating systems, especially on Macs, will have issues loading websites and running various programs. Considering that El Capitan was replaced several years ago by Sierra, and has since gotten even more updated versions and OS releases, I'd advise looking into updating it. If your current device is unable to be updated to a newer system, then there's not much else we can offer as far as accessibility to our site and services.
As of writing this post, the most up-to-date Mac OS appears to be Monterey (Star), with Ventura slated to release later this year. For more info regarding Mac operating systems, I'd advise reaching out to Apple support. They'll also be able to give you a more definitive answer on whether your particular Mac device is able to run any of their more recent OS's.
While I understand that you may not be able to use our services due to the older device/OS, I do want to make sure that you understand that this issue won't be just affecting your accessibility to our site. As time goes on, other sites and programs you utilize will likely lose functionality with each of Apple's new OS releases for Macs. It's a similar issue with PCs, and other devices / operating systems.
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