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Gold! Finally everything seems to be fine. Changed to iMac18,3 and now have VDA Decoder fully supported, and did again the usb mapping with a few tweeks, used the SSDT-UIAC and USBinjectall and Voila!.. Thanks to all of you for the great help. You are incredible kind! :D

Im getting 40MB read and write and i dont think the problem is the hdd. If i remember right, the same external hdd had faster speeds in windows. I will try what said! ;)

Thank you mate! I will try with USBinjectall method and change change my SMBIOS. :)

Here is the usb tab. I noticed that my platform id is 0x000000 and VDA decoder failed. Any ideia why?

Thank you so much for your time and help UtterDisbelief! Ok, so i left just the SSDT-EC-USBX.aml in acpi folder, disabladed the port-limit removal patch in Config.plist, left the USBPorts.kext in kext folder but still have just +-40MB/s with an usb3 device in a usb3 port... :( What can be the...

Thank you so much! Yes, im using an old ps/2 keyboard! :D So i just need USBPorts.kext and SSDT-EC.aml, right? But hackintool didnt create one, just USBPorts.kext, SSDT-UIAC and SSDT-EC-USBX. Is SSDT-EC-USBX the same as SSDT-EC? If not , how can i compile one SSDT-EC?

Thank you. So i should use "SSDT-EC-USBX" and "SSDT-UIAC" created with hackintool and use "USBInjectAll.kext" in kexts folder? Isn´t that the same as using "usbports.kext"?

Hey guys. I recently changed to opencore bootloader and i am satisfied. Boot is much faster than clover and overall the system is more stable. But, even with the "usbports.kext" that i made with hackintool, the usb ports are really slow, and i cant figure out why. Can somebody take a look in...

I did it! Just needed to manually choose "Install from Catalina-data" in each of the two reboots of the process. Previously just did that in the first one.

But my board is different from yours. Do you think it will work?

I cant update!! First, I updated kexts and Clover bootloader. Now, when I'm trying to update, I chose "Install from Catalina-data" and a grey window appears with "remaining time 36 minutes". But, suddenly it reboots and boots normally in 10.15. Anyone with the same problem?

You are Gold! I did everything you said and now works again. Just having some random ejects but ill see that more deeper tomorrow. Thanks! The same for you. Thanks!

Didn’t know that, sorry if it’s something that everyone knows by now. I thought that the costum ssdt would be something more “bulletproof “ :D. I guess I’ll have to wait. Thanks

Hey Guys! I tried everything and I can't manage to have my usb 3.0 ports working in Catalina and I don't understand why!! Can someone see my EFI and give me some light? I ve managed to have my built working flawlessly in Mojave with a costum SSDT, but since I updated do Catalina (fresh...