I own two external Western Digital MyBook USB hard drives, which I have used with my old iMac (died recently (sigh) ) without any problem. The hard drives have been connected on separate iMac ports using USB2.0 and I have turned on WD Security.
Now I have a new Mac mini and I have migrated (with the Assistant) my old settings and everything from my old internal drive to the new Mac mini internal drive. Since the Western Digital hard drives support USB3.0, I have connected both drives to the USB3.0 ports.
How to use Energy Saver preferences to keep your Mac from sleeping. Open System Preferences by navigating to the Apple icon in the top left menu, selecting the System Preferences icon in your. Stellar Data Recovery software addresses 15 worst Mac hard disk drive, external drive and SSD problems with data recovery and disk management tools. Download link is in the show more tab: Take a Second to Subscribe and Thumbs up if you're. On your Mac, choose Apple menu System Preferences, then click Energy Saver. Open Energy Saver preferences for me. Do any of the following: Set your Mac to go to sleep and wake up at a specific time: Click Schedule in the bottom-right corner, then select the options you want to use. See Schedule your Mac desktop computer to turn on or off. Set the amount of time your computer or display. You see the UPS button only if your Mac is connected to an uninterruptible power source. “Computer sleep” and “Display sleep” sliders. Drag the slider to set the amount of time your computer or display should wait before going to sleep. Put hard disks to sleep when possible. Puts the hard drive to sleep whenever the computer is inactive.
Everything works fine until the mac goes into sleep mode and the drives spin down. After waking it up, the drives start to spin up but I am not longer able to view/access the content of the external drives. It seems that Finder does not wait long enough and does not reattempt to access the drives.
What I have tried:
System Control->Energy Settings: Do not deactivate hard disks
WD Utility: Deactivate Sleep Timer
Maybe MacOS has migrated old drive configurations from the old internal disk which causes the problem but I don’t know how delete those configurations.
Mac Os Prevent Sleep
Prevent Hard Drive From Sleep Mac App Store
Any suggestions
g
Michael