Your computer’s hard drive needs to have at least 5-10% of total space available in order to be able to work at its full potential. This will almost certainly slow down your computer EVERY SINGLE TIME. Have you been getting this message on your Mac? If there is a software issue with the computer, there is no “one size fits all” solution for each situation, but if there is a specific issue with the OS, then sometimes a complete erase and reinstall of the OS will fix the issue. Sometimes, you can see the beachball if there is a software issue. We go over the difference between traditional hard drives and solid state drives (SSDs) here. It is also the reason that SSD drives exist. This happens because the hard drive cannot physically read where your data is. At this point, if your data is on a part of the platter that is corrupted/damaged/unreadable - your computer will exhibit the signs listed above (slowness, beachball, applications not loading). That spindle has an arm on it which moves back and forth to read the data that is on the platter (where your data is stored). Your hard drive is made up of spinning platters that are located on a spindle. The beach ball showing up a lot on your Mac can happen for a few different reasons, but it could also be a sign that your computer's hard drive is having a hard time reading the portion of the hard drive that your application/data is stored on. Your Mac makes strange noises, such as audible clicks or scratching sounds.Overall slow performance than what you are used to.Applications take a long time to open, won't open at all or frequently freeze.

Mac is slow to boot up or won't boot up at all.The first signs that your hard drive might need replacement are as follows: While working on and servicing Macs, we see many computers needing hard drive replacements. That being said, we will go over a few signs of what it looks like when a hard drive is close to needing replacement and what the best options are for getting your Mac back up and running! Signs of a Bad Hard Drive

One question we get a lot here at CityMac is 'how do I know if my hard drive is going bad and when does it need to be replaced?' Hard drive replacements are probably the most common computer repair and it is often the most important because the hard drive is where all of your personal information is stored.

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