Hi mlove,
Thanks for the report. We’re aware of this one, and actively working on it. It only affects TAP (bridged) connections on macOS 15.0.1 and 15.1, TUN (routed) connections are not affected, nor are earlier versions of macOS.
It’s related to Apple blocking access to the APIs necessary for Viscosity’s Virtual Ethernet driver as discussed in this forum post:
https://www.sparklabs.com/forum/t/problem-with-macos-virtual-ethernet-en/2213/1
As mentioned in that post, Viscosity will be automatically falling back to the “Fake Ethernet” backup TAP driver, however performance with this can be very poor with many setups. We anticipate on having a beta version out later this week that significantly improves Fake Ethernet performance, so please keep an eye out for that:
https://www.sparklabs.com/support/kb/article/using-viscosity-beta-versions/
We’re also aiming to have another update out sometime in the next few weeks that restores Viscosity’s Virtual Ethernet driver support as well.
Cheers,
James
