As Mac hard disks grew larger, fragmentation of file data, file system metadata and free space slowed the disk down. Here’s how we used to solve that.
TechTool Pro
How to check your Mac’s hardware, interpret the results, deal with problems, and tackle tricky intermittent faults.
Want to keep an eye on your hard drive(s) and SSD? Worried that your SSD might need replacing? Here are some tools to put your mind at rest.
How to run Apple’s diagnostic software to work out whether your Mac has a hardware fault – and how to interpret its error codes.
For the last 15 weeks, this iMac has been freezing sporadically. I have run out of ideas, and hope that 10.11.6 fixes the bug.
Do third-party disk tools work with Fusion Drives, or are you stuck with just Disk Utility?
The icon for my 2 TB external drive is greyed out in Disk Utility, and I can do nothing with it. How can I restore its normal function?
The real world performance of S.M.A.R.T. to warn of imminent drive failure is not as impressive as its claims, but here is how to get better use from it.
The Eclectic Light Company 