Apr 21, 2019  I can't do a TM backup either to a drive connected with a cable or to a network drive. Both worked perfectly well until Mojave update. According to the thread above, Apple engineers don't seem to know what the problem is. I thought my network drive somehow broke, then connected a regular external SSD. Same problem. Mac running slow after Mojave update. So you’ve successfully installed macOS 10.14 Mojave to find out that your Mac’s performance got worse. This maybe not a Mojave-specific issue, though. Normally, people judge the efficiency of their Mac by looking at speed of their most-used apps.

There is no longer any need to repair permissions when using Mojave.

If your Mac has a Fusion Drive and you see a flashing question mark or alert, see the troubleshooting section of the Apple Support article About Fusion Drive, a storage option for some Mac computers. If you continue to have problems with your disk or it can’t be repaired. Rename the drive 5. Select OS X Extended (Journaled) for Format 6. Select GUID Partition Map for Scheme Note: If you do not see the scheme option, then you have selected the volume and not the drive. Click on the view button in the upper left-hand side, change to Show All Devices. Select the non-indented entry for your Seagate drive. Format your Seagate hard drive to Mac OS Extended (Journaled) file system. And use your Seagate hard drive for a Time Machine backup of your MacBook Pro, MacBook Air or iMac. Plus you can drag and drop your files. Copy and paste your files to and from your Seagate external hard drive onto your Mac.

Repair the Drive for El Capitan or Later

1. Restart the computer and after the chime hold down the Command and R keys until the Utility Menu appears.
2. Select Disk Utility and press the Continue button.
3. Then select the indented (usually, Macintosh HD) volume entry from the side list.
4. Click on the First Aid tab in the toolbar and wait for the Done button to activate. Click on it, then quit Disk Utility.
5. Select Restart from the Apple menu.

Dec 14, 2018 8:19 PM

Summary: Tutorial to make Mac recognize Seagate Backup Plus drive when it's not showing up on Mac. You'll know how to fix when Mac doesn't detect Seagate Backup Plus drive. If necessary, you can also recover data from the unrecognized Seagate Backup Plus drive with iBoysoft Data Recovery for Mac.

Seagate Backup Plus drives are great external hard drives for Mac and PC. And there are many options like Ultra Touch, Slim, and Portable. However, many users report that the Seagate Backup Plus for Mac is recognized, or the external hard drive is not showing up on Mac at all.

Here is an example:

I use a Seagate 2TB Backup Plus Portable HD as my Time Machine backups drive and it had been working fine. Since I upgrade to Yosemite (maybe coincidental?) the HD is no longer recognized by my MacBook Pro. I can see the light on HD so I am sure it is getting power. I searched for all day but no Seagate firmware update available (attempt to update shows it to be current) and no other help available from Seagate 'support.' Can anybody help me cuz I'm really in need of the files on this drive？

- Post from Apple Communities

In this case, you can't see files on the external hard drive or access them at all. So, it's important to know why and how to fix when Seagate Backup Plus drive is not showing up on Mac.

Why Seagate Backup Plus drive not showing up on Mac?

Actually, it's a common issue that the Seagate Backup Plus drive is not recognized or detected. And sometimes the external hard drive even greyed out in Disk Utility. The reason for this issue is various. And here are some possible causes for this problem.

The causes for Seagate Backup Plus drive not detected issue could be:

• A recent macOS update or software update, which could cause many types of incompatibility.
• The hard drive is encrypted or password-protected, especially for Seagate Backup Plus Ultra Touch hard drive.
• Faulty connections such as the wobbly USB port and broken USB cable.
• Power supply failure, especially when MacBook is in low power mode and external hard drives requires extra power resource.
• The outdated disk driver that appears if you haven’t updated your software and hardware for a long time.
• Virus infection that comes from recently downloaded files, applications, patch, etc.
• External drive hardware errors like bad sectors.
• Other unknown reasons.

Then how can you fix the problem that Seagate Backup Plus Drive is not recognized/showing up on Mac?

First of all: Have some basic checks

Once your Seagate Backup Plus drive is not recognized on your Mac computer, you can try some routine checks first.

1. Re-plug the Seagate Backup Plus drive and verify if the drive light is on. Desktop Drives typically require a power adapter.
2. Try a different USB port or cable to see whether the USB port or cable is bad.
3. Connect Seagate Backup Plus drive to another Mac or PC and see if it is compatible with it.

All checks seem to be OK? Then you can fix this issue with the following solutions one by one.

Show Seagate Backup Plus drive in Finder and on Mac desktop

For many Mac users, when they say Seagate Backup Plus drive is not showing up, they mean their drives can't show up in Finder or on Mac desktop. In this case, you can try to show your Seagate Backup Plus drive through resetting Finder Preferences.

Step 1: Go to Finder >Preferences > Sidebar.

Step 2: Tick 'External disks' in Sidebar tab to show external hard drives in Finder.

Step 3: Shift to the General tab.

Step 4: Check 'External disks' under 'Show these items on the desktop' and you’re your connected Seagate Backup Plus drive will appear on Mac desktop.

Check if Seagate Backup Plus drive is showing up in Disk Utility

After setting 'External disk' to show up in the Finder or on desktop, your Seagate Backup Plus drive is still not showing up on Mac? You need to check if the Seagate Backup Plus drive is showing up in Disk Utility.

Scenario 1: Seagate Backup Plus drive shows up in Disk Utility

If Seagate Backup Plus drive is listed in Disk Utility, then you can have a relief because it means your drive has no serious hardware problem. And you can follow the below solutions to fix the unrecognizable Seagate Backup Plus drive.

a. Mount Seagate Backup Plus drive

Sometimes, external hard drives cannot be automatically mounted on Mac. But you still have a way to mount Seagate Backup Plus drive manually in Disk Utility:

Step 1: Open Disk Utility.

Step 2: Right-click the Seagate Backup Plus drive from the left sidebar and then click the Mount button.

b. Repair Seagate Backup Plus drive via First Aid

If the above method doesn't work, it might refer to some file system errors on the Seagate Backup Plus drive. You should check and verify Seagate Backup Plus drive by First Aid.

Step 1: Launch Disk Utility.

Step 2: Choose the grayed-out Seagate Backup Plus drive.

Step 3: Select First Aid in the top center and click Run.

Tips: You can also download Seagate's software like Seagate Dashboard to diagnose and repair disk drive errors.

c. Reformat Seagate Backup Plus drive

If First Aid fails to correct errors on Seagate Backup Plus drive, the last choice is to reformat Seagate Backup Plus drive. But reformatting will erase all data stored on Seagate Backup Plus drive. If data stored on the external hard drive are important for you and you don't have any backup, you'd better recover lost data from the unrecognized Seagate Backup Plus drive at first with Mac data recovery software, like iBoysoft Data Recovery for Mac.

Step 1: Recover lost data from Seagate Backup Plus drive

iBoysoft Data Recovery for Mac is a free Mac data recovery software that can recover data from Seagate Backup Plus drive efficiently, whether the drive is unrecognized, formatted, inaccessible, corrupted, unmountable, or unreadable. It also can recover deleted files from emptied Mac trash. This data recovery tool works with macOS 10.15/10.14 /10.13/10.12 and Mac OS X 10.11/10.11/10.10/10.9/10.8/10.7.

Tutorial to recover lost data from Seagate Backup Plus drive with iBoysoft Data Recovery for Mac

1. Download and install iBoysoft Data Recovery for Mac on Mac.

2. Launch iBoysoft Data Recovery for Mac.

3. Select the drive you want to recover lost data from and click 'Scan' button to scan for all lost data.

4. Preview the searching results, choose files you need, and click 'Recover' to get them back.

Step 2: Reformat Seagate Backup Plus drive

1. Launch Disk Utility.

2. Select the Seagate Backup Plus drive on the left part of the window.

3. Click the Erase on the top of the Disk Utility window.

4. Complete the related information (name, format, scheme), then click Erase.

Scenario 2: Seagate Backup Plus drive not showing up in Disk Utility

If Seagate Backup Plus drive is not showing up in Disk Utility, unfortunately, your Seagate Backup Plus drive may have some physical problems. In this case, you'd better send the drive to a local data recovery service and see if they could help. What's more, you can contact Seagate Backup Plus support team for disk repair and replacement service.

Bonus part: ways to use Seagate Backup Plus drives on Mac

Seagate Backup Plus drives are available in 1TB, 2TB, 4TB, and 5TB. And usually, the Seagate Backup Plus drive is formatted with either exFAT, FAT32 or NTFS. That’s to say, you can use Seagate Backup Plus drive for different aims. For example, you can use Seagate Backup Plus drive for Time Machine Backup, or you can simply use it to free up space for Mac internal hard drive.

How to use Seagate Backup Plus drive to back up files on Mac?

Any Issue With Seagate Drive And Mac Os Mojave Download

Different from Windows computer, you can download Seagate software like Toolkit to back up and sync files directly. On Mac computer, you can follow these steps to back up files like photos, documents, and videos on Mac.

Step 1: Plug in your Seagate Backup Plus (It could be Ultra Touch, Slim, and Portable) to your system.

Step 2: Choose Yes when Mac asks you 'Do you want to use your Backup Plus as a destination for Time Machine'.

Or you can manually open Time Machine from your Menu Bar (or from System Preferences), choose Select Backup Disk, and then select Seagate Backup Plus Drive for Backup.

Any Issue With Seagate Drive And Mac Os Mojave 2

Tips: If you newly bought a Seagate Backup Plus drive for your Mac which is NTFS (Read-only on Mac) formatted, you need to reformat it as HFS+ or exFAT before you use it on Mac. Or you can download an NTFS for Mac software, then you can use the NTFS external hard drive both on a Mac and PC.