Click on the lock icon and enter your Admin password when prompted. Create a New User Account Open Users & Groups preferences.

Restart the computer from the Apple Menu. Quit Disk Utility and return to the Utility Menu. Click on the First Aid button in the toolbar. Select the indented (usually, Macintosh HD) volume entry from the side list. Choose Disk Utility and click on the Continue button. Immediately after the chime, hold down the Command and R keys until the Utility Menu appears. Repair the disk by booting from the Recovery HD.Test in safe mode to see if the problem persists, then restart normally. See How to use safe mode on your Mac.Reset your Startup Disk and Sound preferences, if needed, after resetting the PRAM.Reset the System Management Controller (SMC).Wait 30 seconds before you restart the computer.Shut down the computer and disconnect all third-party peripherals.If possible, backup your files before proceeding. You should try each, one at a time, then test to see if the problem is fixed before going on to the next. Thanks in advance for any suggestionsĪ Troubleshooting Procedure that may Fix Problems with macOS El Capitan or Later The local repair shop suggested I change the HD for SSD but having not even spent 1 minute to look at the problem I'm tempted to think that whilst it would improve speed it isn't the real problem. I have Avast AV software, the free version, but as it's been there for 4 years I tempted to think this is not the root cause of the problem even if it is doing nothing in reality to protect my Mac. It has 8GB of RAM and the memory pressure is orange - 70% of my 1TB HD is free, my CPU shows as 5% usage in the activity monitor so I'm lost as to what to do. I have an iMac from early 2013 and recently it has become very slow to boot up and even slower to operate afterwards - opening safari takes about 10 minutes but any selection of software/apps takes the same amount of time - I've cleared the cache/cookies - I've run diagnostics in file utility - deleted unused apps etc to no avail.

Imac 27 late 2013 running slow