Legacy System Extension on MacOS

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Ellory Yu

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Legacy System Extension on MacOS

PostFri Aug 22, 2025 6:49 pm

I'm on MacOS Sequoia (15.5) and today got a popup notification on "Legacy System Extension" (see screenshot below) after signing on. Apparently the system extension that could be incompatible with future versions of MacOS is signed by BMD and it says to contact the developer (BMD). How do we find out which BMD extension is considered as Legacy?

Screenshot 2025-08-22 at 11.18.36 AM.png
Screenshot 2025-08-22 at 11.18.36 AM.png (264.99 KiB) Viewed 3901 times

Screenshot 2025-08-22 at 11.19.28 AM.png
Screenshot 2025-08-22 at 11.19.28 AM.png (850.27 KiB) Viewed 3901 times
URSA Mini Pro 4.6K G2, BMPCC 6K. iMac Pro 27” 5K Retina, 64gb, 1Tb SSD, 12Tb M.2 NVMe TB4 DAS, 36Tb HDD DAS, Vega 56 8gb GPU/ BM Vega 56 8gb eGPU, MacOS Sequoia+DVRS 19.1.4, BM Panel & Speed Editor. Mac Mini M2 Pro 10/16 cores, Sequoia+DVRS 20
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Reynaud Venter

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Re: Legacy System Extension on MacOS

PostSat Aug 23, 2025 6:54 pm

Is a Decklink present on that system with Desktop Video installed?
Mac Pro 7,1 Rack • DaVinci Resolve Studio 20.2.3 • macOS 15.7.2 (24G325)
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Ellory Yu

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Re: Legacy System Extension on MacOS

PostMon Aug 25, 2025 5:31 am

Reynaud Venter wrote:Is a Decklink present on that system with Desktop Video installed?

No. It is using an UltraStudio Mini Monitor instead of a Decklink. I attribute it to the Desktop Video driver that’s used for the UltraStudio. But it doesn’t tell me what extensions are not going to be supported but just to contact the developer and let them know.
URSA Mini Pro 4.6K G2, BMPCC 6K. iMac Pro 27” 5K Retina, 64gb, 1Tb SSD, 12Tb M.2 NVMe TB4 DAS, 36Tb HDD DAS, Vega 56 8gb GPU/ BM Vega 56 8gb eGPU, MacOS Sequoia+DVRS 19.1.4, BM Panel & Speed Editor. Mac Mini M2 Pro 10/16 cores, Sequoia+DVRS 20
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