diglloydTools

a 64-bit application which tests drive performance and reliability for single volumes or RAID. Some highlights:

• The fill-volume command is your smart move for forcing bad blocks to be mapped out whenever you get a new hard drive, as well as for graphing performance across the volume;
• The recondition command brings your solid state drive (SSD) back up in performance.
• The run-streams command helps video users determine if their hardware can support multiple video streams.

DiskTester can also be used for testing digital camera cards, network performance, or comparing single-drive performance with SATA, FireWire and USB. Its sophisticated testing approach offers the most consistent and reliable results available on the Mac today.

DiskTester is a 64-bit application that requires 10.6 Snow Leopard or OS X 10.7 Lion or OS X 10.8 Mountain Lion or OS X 10.9 Mavericks.

A 64-bit application designed to "stress test" your Mac, particularly memory. Some highlights:

• Use MemoryTester on a new computer to "burn in" your computer and make sure your memory, CPU, motherboard and cooling systems are all functioning properly under load.
• Use MemoryTester after you add more RAM to your computer to make sure the RAM is good.
• Use MemoryTester if your computer is behaving strangely or exhibiting instability to narrow down the cause.
• Use MemoryTester to measure scalability performance with CPU cores.
• "There is no other tool that will stress test your Mac® like MemoryTester can. If your Mac passes an extended test, you can have a high degree of confidence that the memory and Mac are reliable."

MemoryTester is a 64-bit application that requires 10.6 Snow Leopard or OS X 10.7 Lion or OS X 10.8 Mountain Lion or OS X 10.9 Mavericks.

Provides ultra-efficient validation of your data, including your originals and backups. Even single-bit errors are detected, anywhere in a file, using the cryptographic grade SHA1 hash.

• Validate the integrity of your files at any time, even backups on CDs or DVDs*!
• See which files have changed by date or size or contents.
• Detect file corruption and/or inability to read files (e.g., on DVD or CD*).
• Have confidence your files are intact.

IntegrityChecker is the perfect tool when moving data (backing up, switching systems, etc), because you can verify that all data has 100% fidelity to the original copy. And you can do so a day, a week or a month later, an important consideration if a system meltdown requires restoring all your data.

Both a GUI and a command-line interface are supplied. Most users will find the GUI suits their needs.
For full control over test parameters, IntegrityChecker can be run in Terminal as a command line interface.