You can modify the disk sleep time by using the following command. When asked, enter your password and press Enter. To check the default disk sleep time on your Mac, enter the following command and click Enter. Open Finder and go to the Applications > Utilities folder to launch Terminal. Change the disk sleep settings via Terminal.Īnother way to fix the external hard drive keeps disconnecting on Mac issue is to change the default disk sleep time to maximum by using Terminal. If you are running macOS Monterey/Big Sur, uncheck "Put hard disks to sleep when possible." If you are running macOS Ventura, go to Options > adjust "Put hard disks to sleep when possible" to Never. Navigate to Apple menu > System Settings > Battery. To disable the option, follow the guidelines listed below. You should confirm that your Mac is not set up to put the hard disk to sleep when it turns off the display in order to save energy. ![]() ![]() If your drive functions well using another port, then probably your external hard drive keeps disconnecting on Mac because of the faulty port. Even though the cable appears to be in working order, it is still advised to try a different one. Replace the cable with a shorter one if it is damaged or overly long. Inspect whether the cable is fried or torn.
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