DASPI kext on Sequoia with Xbox 360 HD DVD Drive

[calebhays]

I'm working to back up some remaining HD DVDs with an Xbox 360 HD DVD drive (Toshiba). Connected to a Mac mini m4 running macOS Sequoia. Getting the DASPI install recommendation, as well as severely decreased performance.

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Optical drive "BD-ROM TOSHIBA DVD/HD X807616 MC08" opened in OS access mode.
It's highly recommended to install DASPI kernel extension to improve performance.

However, when I try the installer, I get an error message: "This package is incompatible with this version of macOS. The package is trying to install content to the system volume. Contact the software manufacturer for assistance."

The recommendation from mike admin at viewtopic.php?f=4&t=2564 to change boot args no longer seems to work under Sequoia. Does this work under Recovery OS? Any other ideas to get DASPI installed? I assume this is still required under Sequoia since I'm getting the recommendation and performance is so impacted. As it stands now, I can get basically everything but the VC-1-encoded main features copied.

I've done some serious searching of the forum and web searches but am coming up empty. Any ideas?

[dcoke22]

Running an unsigned kernel extension in modern macOS is pretty hard and should be avoided generally.

Securely extending the kernel in macOS

It might be easier to do on an older Intel mac. Or see how well that drive works on a Windows or Linux machine. Or, depending on how many HD-DVDs you have, buy those titles on blu-ray.

[calebhays]

Thanks. I've been working to get this installed on a Mac mini 3,1 running El Capitan instead.

Despite disabling SIP, DASPI.kext is showing as "Loadable: No" in System Information. When I run

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sudo kextutil /Library/Extensions/daspi.kext

, I get the following:

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Diagnostics for /Library/Extensions/daspi.kext:
Code Signing Failure: not code signed
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext "/Library/Extensions/daspi.kext"
kext signature failure override allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext "/Library/Extensions/daspi.kext"
(kernel) kxld[com.makemkv.kext.daspi]: The following symbols are unresolved for this kext:
(kernel) kxld[com.makemkv.kext.daspi]: 	__ZN12IOUserClient8DispatchE5IORPC
(kernel) kxld[com.makemkv.kext.daspi]: 	__ZN15OSMetaClassBase8DispatchE5IORPC
(kernel) kxld[com.makemkv.kext.daspi]: 	__ZN9IOService8DispatchE5IORPC
(kernel) Can't load kext com.makemkv.kext.daspi - link failed.
(kernel) Failed to load executable for kext com.makemkv.kext.daspi.
(kernel) Kext com.makemkv.kext.daspi failed to load (0xdc008016).
(kernel) Failed to load kext com.makemkv.kext.daspi (error 0xdc008016).
Failed to load /Library/Extensions/daspi.kext - (libkern/kext) link error.
Check library declarations for your kext with kextlibs(8).