Security updates for older iMac
Are security updates still available for download on my older iMac running High Sierra?
iMac 27″, macOS 10.13
No. High Sierra is no longer supported.
3 replies
Security features such as the read-only system volume, and the updates to the built-in anti-malware tools such as the addition of XProtect Remediator, will also require newer versions, among other enhancements made to macOS.
Mostly you just need a more modern Browser than Safari on High Sierra, like Firefox or Brave.
Security updates for older iMac