If it wasn't for stupid people, Apple wouldn't have a market.

On Monday, Apple released its latest iteration of Mac�s operating system,
macOS Sequoia. The new update introduced tighter control over app
permissions and an overhaul to Gatekeeper, among other features. However,
according to TechCrunch, it now appears to be disrupting security tools
made by CrowdStrike, SentinelOne, and Microsoft. Social media users are
also reporting connection failures with third-party VPNs.

Details are sparse at the moment, but a possible source of the issues is
Sequoia�s current firewall. This is useful for managing connections on
untrusted networks. If you�re an everyday user and not a security nut or
part of an enterprise team, your firewall is likely already off. This is
the default on Mac, as most users are on trusted networks anyway (Apple�s
way of balancing usability and security).

Many experts have noticed that turning off the firewall fixes the
disruptions to any network-based tools. However, if the firewall is
already enabled to begin with, you probably wouldn�t want to do this.

Patrick Wardle, a long-time iOS and Mac security expert and founder of the
Objective-See Foundation, expressed his frustration, noting that Apple�s
lack of thorough testing is to blame.

�As a developer of macOS security tools, its incredibly frustrating to
time and time again have to deal with (understandably) upset users
(understandably) blaming your tools for breaking their Macs, when in
reality it was Apple�s fault all along,� Wardle told 9to5Mac.

�D�j� vu?! Did Apple *again* release a new OS that *again* breaks 3rd-
party security tools?� he added in a posted on his LinkedIn in reference
to a bug two years ago in MacOS Ventura that caused similar problems.
�Root cause appears to either be macOS firewall itself, or the lower-level
networking extension subsystem that is �corrupting packets� or other
�unintentional changes� to network structures.�

Other security-focused communities are sharing similar concerns.
Vulnerability researcher Will Dormann shared in a blog post that DNS
requests over a network are blocked by macOS Sequoia when the firewall is
set to �Block incoming connections,� which unexpectedly includes DNS
responses. This issue did not exist in previous macOS versions, and it
seems to be a bug in the current firewall. �Any response to a request that
I initiate should be allowed in.�

Dormann also noted that another problem is that Sequoia�s firewall GUI is
not synced correctly with the actual firewall rules, making it difficult
for users to adjust or modify settings, especially for those using older
Macs.

This would undoubtedly cause issues connecting to third-party VPNs. I�m
currently having issues connecting with Windscribe on macOS Sequoia. Other
members of 9to5Mac have no problems with Nord VPN. What about you?

MacOS 15 total fail in networking. VPNs not working anymore or something
they disconnect without any reason, VMs are not working anymore using
Shared Networking (@UTMapp). Sometimes DHCP is simply refusing to provide
IP

� Alex Kleber a.k.a Privacy 1st (@privacyis1st) September 19, 2024
If you�re a user of Crowdstrike, it appears Apple has already confirmed
the networking issues happening. Hopefully a fix is in the works ?? and
coming soon.

https://9to5mac.com/2024/09/19/security-bite-macos-sequoias-filewall-is-
disrupting-security-tools-and-more/