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Hi; I've no experience with RTS5227 but I've had a couple of laptop, including my current Dell Latitude E7270, with the Realtek RTS525a model. All I use is Firewall's RealtekCardReader kext v0.9.7 (without its associated friend). The card reader is only ever functional after a 1st sleep. I suppose an ACPI patch would fix this but I never bothered to debug the wake process to identify what's done at ACPI level for the device compared to what's done (and not done) at 1st boot. I don't use it much so it's never really been a problem. I inject properties in my bootloader's config so my RTS525a card reader is listed in SysInfo->PCI section but, indeed, nothing in the SysInfo->Card Reader section. It's something I could not care less about. Still works perfectly in Sequoia (and Tahoe beta for that matter).

Try these kexts, I forked the repository and made them compatible with newer OS, the original versions are stuck in Ventura https://github.com/Baio1977/GenericCardReaderFriend https://github.com/Baio1977/RealtekCardReaderFriend It needs https://github.com/Baio1977/RealtekCardReader

Not an installation guide... Thread moved to the support section where it belongs.