Updates and downloads

osrecovery.apple.com

osrecovery.apple.com and oscdn.apple.com serve macOS Recovery. Apple lists both for macOS only, on ports 443 and 80.

Run by ApplePorts: 443 and 80 TCPChecked: 1 November 2026

Short answer

Apple's hosts for macOS Recovery, used when you reinstall macOS over the internet.

Block with care

Blocking them doesn't affect normal use, but reinstalling macOS over the internet from Recovery fails.

Matches
osrecovery.apple.com oscdn.apple.com

A name with *. covers every name under it: *.push.apple.com matches 1-courier.push.apple.com.

What it serves

Apple's enterprise host list names both in its Software updates section, for “macOS Recovery”.

Apple's port list names port 80 for macOS Internet Recovery among other services.

A reinstall over the internet downloads a full copy of macOS, which is many gigabytes.

What breaks if you block it

Block with care

Blocking them doesn't affect normal use, but reinstalling macOS over the internet from Recovery fails.

What breaks if you block it

  • Reinstalling macOS from macOS Recovery over the internet fails.

With Kilobat Pro and the network filter, you can block a host for every app or for one app: in Connections, select a connection and choose Block. Apple’s own services are never blocked by Kilobat’s Protection lists.

Apple’s rules for its hosts

Apple’s list, Use Apple products on enterprise networks, says that devices open these connections, not Apple’s servers. Apple services fail any connection that uses HTTPS interception, so a proxy that inspects TLS should leave Apple’s hosts alone.

If a firewall allows hosts by name, allowing *.apple.com covers most Apple services, Apple says. A firewall that works only with addresses can allow 17.0.0.0/8 for IPv4, and 2403:300::/32, 2620:149::/32 and 2a01:b740::/32 for IPv6.

To see which app on your Mac opened a connection to this host, use Kilobat’s Connections tab, or the agent network log for AI agents.

Sources

Checked on 1 November 2026.