It contains a link to download EtreCheck. Read below.Īpple Support Communities contributor etresoft wrote a very useful app to quickly gather certain system information that may help point to a cause of this problem. If you don't know where to start, EtreCheck can help with that. If you are still experiencing problems more information will be required.
To end Safe Mode restart your Mac normally.Merely starting your Mac in Safe Mode is not intended to resolve the problem, it's to observe its performance without certain additional components.Starting your Mac in Safe Mode will take longer than usual, graphics will not render smoothly, audio is disabled on some Macs, and some programs (iTunes for example) may not work at all.You must disable FileVault before you can start your Mac in Safe Mode.Safe Mode or "Safe Boot" is a troubleshooting mode that bypasses all third party system extensions and loads only required system components.If it does, attention should be given to the possibility of a hardware fault. Aside from being a general pain to use in Safe Mode, it should not lock up or stall in the manner you describe. Then, determine if the symptoms occur in "Safe Mode" (read below).A failed hard disk drive is one of a number of causes for the symptoms you describe, and if you value the information your Mac contains a backup is required even if it is operating normally. To learn how to use Time Machine read Mac Basics: Time Machine backs up your Mac - Apple Support. Back up your Mac if you have not already done so.