I know the High Sierra issue has been addressed. Also, I can't find where Path Finder has been updated to use Airmail 3 as. Mkridel: launch system preferences/'users and groups'- what does it. Regarding the permissions issue, if you won't be able to resolve it yourself, I'd suggest doing the following. Mac won’t start after Sierra installation If the installation has finished, but instead of Sierra you only see a dull grey screen, you can resort to hardcore restoring methods. One of them should fix Sierra issue with a failing startup.

• Press and hold the Power Button until your Mac turned off. • Wait for few seconds and then press the Power Button to turn it on. Solution 2: • Turn off your Mac via Apple menu-> Shut Down. • Press the Power Button to turn on your Mac. • Then immediately press and hold the Option + Command + P + R keys simultaneously as quickly as possible after pressing the Power Button. • Keep pressing until you hear the startup sound for the second time.

Solution 3: Disconnect all cables connected with your Mac. If your Mac has a non-removable battery, • Shut down your Mac via Apple menu-> Shut Down. • Press and hold the Shift + Control + Option + Power Buttons simultaneously. • Then release the keys at the same time. • Turn on your Mac by pressing Power Button. If your Mac has a removable battery, • Shut Down your Mac.

• Remove the battery out of your Mac. • Press and hold the Power Button for 5 seconds. • Insert the battery into your Mac. • Turn on your Mac by Pressing Power Button. Solution 4: Restart your Mac in Safe Mode (Safe Boot) Restart your Mac in Safe Mode will fix many issues on your Mac. But you can’t use some features in Safe Mode. • Turn off your Mac via Apple menu-> Shut Down.

• Turn on your Mac. • Press and hold the Shift Key as quickly as possible after you hear the startup sound. You can see the Apple Logo on the Screen. • Keep pressing the Shift Key until you see the Login Window. • Enter your User Name & Password to login. You may need to login twice if FileVault is turned on. • If your Mac boot up in Safe Mode, check for update via Apple menu-> System Preferences-> App Store-> Show Updates.

Then Download and Install available updates. Solution 5: Fix disk errors in Recovery Mode • Turn off your Mac via Apple menu-> Shut Down. • Press Power Button. • Press and hold the Command + R keys simultaneously as soon as possible after pressing the Power Button until the Apple Logo appears.

• After that Utilities windows will appear with 4 options. Tap “Disk Utility”. • Tap “Continue”. • Select the disk/drive that you want to repair. • Select First Aid-> Run. This action will check the disk for errors.

• Click “Done”. Close Disk Utility. • Restart your Computer via Apple menu-> Restart. Solution 6: Reinstall High Sierra • Turn off your Mac and press the Power Button to turn it on. • Press and hold the Command + R keys simultaneously as soon as possible after pressing the Power Button. • Keep pressing Command + R keys until the Apple Logo appears.

• After that Utilities windows will appear with 4 options. Tap “Reinstall macOS”. • Tap “Continue”. • You will be prompted to choose your disk.

If you are not asked to select your disk, tap “Show All Disks”. You may need to enter your Apple ID. • Tap “Install”. Wait until the installation process is completed. Your Mac will restart after completing the installation. SEE ALSO: Other solutions: • and use it. • to check and solve the issue.

If you know any other solutions to fix this issue, let us know through your comments.

By • 4:00 am, July 23, 2010 • • Clues to the causes of Mac startup problems can be found by analyzing when in the boot process the system fails. Problems may be related to the power supply, battery, hard drive, logic board, OS corruption or an issue with a user account. Macs are reliable machines, but like many of us they get cranky from time to time.

Isolating where the problem is occurring is key to finding the solution. Unplug any external peripherals (disk drives, printer, etc.) to help narrow down the cause. This post is sponsored by MacPaw, maker of CleanMyMac. The following questions are helpful to narrow down the cause of your Mac’s lethargy: Does the system turn on? If your Mac won’t power on at all, likely suspects are a failed power supply, a bad logic board, a blown fuse (on desktops), a dead battery or a bad AC adapter (on portables). Failed power supplies are sometimes accompanied by a popping sound. That’s usually a capacitor which has given up the ghost and burst open.