Computer won't sleep when booted in Catalina (using Catalina patcher)

[PapaPiccolino]

Hi everyone.

I have a Mac Pro 3.1 with 32 GB RAM, and fitted with 4 hard drives :

- drive 1 has OS X 10.6.8 Snow Leopard, formatted as Mac OS Extended
- drive 2 has OS X 10.11.6 El Capitan, formatted as Mac OS Extended
- drive 3 has no OS, formatted as Mac OS Extended
- drive 4 has OS X 10.15.7 Catalina, formatted as APFS, and installed using the dosdude Catalina patcher tool.

The Catalina install was undertaken 2 weeks ago. It seemed to go fine, and all seems OK, except the computer won't sleep when booted in this drive (the Catalina drive). When I boot into Snow Leopard and El Capitan, sleep works correctly.

I have tried zapping PRAM, reset SMC, adjusting the Energy Saver preferences, but it makes no difference - the computer won't sleep.

Any help in solving this would be most appreciated.

Thank you.

 

[Cory Cooper]

Hello and welcome.

Because the Catalina Patchers is a third-party hack, and I don't have access to a similar Mac Pro, it would be very hard to troubleshoot further than you already have. It would probably be best to contact dosdude1 for addional support suggestions.

C

 

[PapaPiccolino]

Hello and welcome.

Because the Catalina Patchers is a third-party hack, and I don't have access to a similar Mac Pro, it would be very hard to troubleshoot further than you already have. It would probably be best to contact dosdude1 for addional support suggestions.

C

Hi Cory. Thanks for that reply. I did contact dosdude via Twitter after I posted on here. He hinted that the issue might be having a non Metal video card. I will look into this in the next few days.

Thanks.

 

[Cory Cooper]

Hi,

No worries, That makes sense and could be the root of the issue.

Let us know how it goes.

C

 

[PapaPiccolino]

Hi again all.

1.One thing I've noticed when booted in Catalina is a very slight lag and slight ghosting when moving the arrow cursor around the screen - would a Metal compatible GPU solve this issue ?

2.Also, I cannot get Blender 2.8 or 3.3.1 to boot in Catalina. Blender 2.8 works perfectly when I use my El Capitan drive - would this be solved by a Metal GPU ?

3.And lastly, would an Nvidia or AMD card be better ? Whichever one I buy will not be an OEM Mac card, it will be a flashed PC card.

Thank you.