Simple Check Your Seagate External Hard Drive You can follow various methods and steps to rectify the problem and use your Seagate external hard drive without hassle. The chances of complete hard drive damage also remain high because of overheating and water damage.įinding the exact cause of the external hard drive not showing up on Mac can be daunting and tedious. Physical Damage: There are many cases where your Seagate external hard drive USB port might be damaged.Logical Failure: Some of the logical failures include virus attacks, accidental formatting, corruption, and more.Some of the general reasons that result in Seagate external hard drive not showing up on Mac are: Before jumping into the solutions, it is essential to know the various reasons for connection failure. However, there are many cases where Seagate external hard drives do not work in Mac systems. Under normal circumstances, as you connect the external hard drive to your Mac system, it automatically gets detected. The external hard drives also come in handy while traveling. With the help of Seagate external hard drivers, you can save your favorite music, videos, photos, and other important documents without any hassle. Seagate external hard drives are known for their unparallel speed and reliable storage features.