No sleep after Catalina.

throwinrocks

macrumors newbie
Sep 18, 2018
15
1
Okay. I think I fixed it. Fingers Crossed..... I did a clean install (CMD+OPT+R will install 10.15.3) once again and the only things I've downloaded are the Chrome browser, Brother Printer drivers and Flash Player. I don't use anything else non-Apple. SLEEP MODE is working now.
When wiping the SSD/HD you have to erase both Macintosh HD and Macintosh HD - Data then you HAVE TO RIGHT CLICK AND CLICK Delete APFS Volume on both. This will remove them and when you Rename the new drive to Macintosh HD or SSD it will remount and rename the drive. EXIT out and then click Install macOS Catalina. Takes about an hour total but my iMac no goes into sleep mode.
Deleting the APFS Volume keeps it from making a duplicate drive name. In Disk Utility it will show 2 of each drive if you don't delete the APFS Volumes. 4 total.
 
Last edited:

JackieTreehorn

macrumors 6502
May 22, 2005
410
282
Brussels
Unbelievable, still no fix. Just came into my office with my iMac and screen alive and kicking, while it is set to go to sleep in 10 minutes.

Thanks, Apple.
 

throwinrocks

macrumors newbie
Sep 18, 2018
15
1
clean install (CMD+OPT+R will install 10.15.3)
If you use a backup it will still cause problems. This is a simple fix but takes about 45-60 minutes.
Then keep track of the software or apps you load onto the Mac or iMac or MacBook. If it starts doing it again you'll know what caused it.
YOU HAVE TO DO A CLEAN INSTALL and you can't put things back on with any backups or Time Machine and you have to delete and unmount the Drives you see in Disk Utility. They will remount when you rename the Drive and then it will create 2 drives. Macintosh HD and Macintosh HD - Data

The only thing I loaded back on mine is Ad-Block Plus, Brother Printer drivers and the Google Chrome browser. Everything like photos is on iCloud and Photos. I never leave important files on my Mac I place them on an external drive and unplug it when not using it.