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TechTool Pro is also a good app, Apple use this as part of their care plan.<br />
<br />
<a href="https://www.micromat.com/products/techtool-pro" rel="ugc">https://www.micromat.com/products/techtool-pro</a>
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TechTool Pro is also a good app, Apple use this as part of their care plan.

https://www.micromat.com/products/techtool-pro [https://www.micromat.com/products/techtool-pro]

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@Suryanarayan: the second link in your post describes the old version of Disk Utility. DU has changed substantially in El Capitan, hence the link I posted.
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@Suryanarayan: the second link in your post describes the old version of Disk Utility. DU has changed substantially in El Capitan, hence the link I posted.

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Macbook Pro<br />
15-inch, Mid 2012<br />
OS X El Capitan <br />
Processor 2.3GHz Intel Core i7<br />
Memory 16GB<br />
Graphics Intel HD Graphics 4000 1024 MB<br />
500GB SATA hard drive<br />
<br />
What tool can I use to test my macbook's hard drive health?
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Macbook Pro
15-inch, Mid 2012
OS X El Capitan 
Processor 2.3GHz Intel Core i7
Memory 16GB
Graphics Intel HD Graphics 4000 1024 MB
500GB SATA hard drive

What tool can I use to test my macbook's hard drive health?

What tool can I use to test my macbook's hard drive health?

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.

Mac OS X

All of Apple's hardware is produced solely by Apple Inc., who determines internal systems, designs, and prices. Apple buys certain components wholesale from third-party manufacturers. The current Mac product family uses Intel x86-64 processors. All Mac models ship with at least 1 GB RAM as standard. Current Mac computers use ATI Radeon or nVidia GeForce graphics cards and include a dual-function DVD and CD burner, called the SuperDrive. Current Apple hardware includes the iPad, iPhone, iMac, Mac Pro, Macbook, iPod and Apple TV. Discontinued hardware includes the Apple I, Apple II, and the Apple III, the Lisa, the Newton, the Quadra, Performa, Centris, Macintosh II and LC series, the Power Macintosh, iBooks and the MacBook.

Apple Hardware

Apple's early computers ran on a variety of operating systems, including a Pascal version and one based on CP/M, before releasing its ProDOS with the advent of its 16-bit computer. With the release of the Lisa, which had its own OS, Apple and computing entered the graphical age; it was followed by the Macintosh, which offered a series of "System" operating systems. Other Mac operating systems included PowerPC until Apple acquired NeXT and folded it into the Mac OS. Current operating systems for Apple devices are Mac OS-X and iOS.

Apple OS

Programs written for the Apple operating systems are distinguished from software created for other operating systems in that it must be approved by Apple for use on its devices, whether it is from Apple (Final Cut, iWork, Keynote, Logic Pro and GarageBand are popular titles), or is a third party application from Parallels, Nuance, Microsoft and Amazon, among many others.