The easiest way of doing this is to do an iPhone hardware diagnostic. They need to be able to easily detect issues with their products so they can fix them and get a better return when they sell. However, most issues are easily fixable with some quick troubleshooting and running a hardware test to see exactly what the issue might be.In addition, businesses that buy and sell iPhones need to make sure that all the phones they sell are in proper working order. Some problems that arise with our phones do require a new phone, like water damage. Spending all that money can be avoided, since a lot of iPhone issues can be easily fixed. My internet connection is working and steady, that is not the point, i think it has to do with 10.13.6īecause my iMac Pro is working properly i will not make a complete new setup.When it comes to running into issues with our phones, many people are quick to just sell them and get a new one. ( for instance "command+R" is okay, " option+command+R" is not ), the normal key combinations ( for instance "shift" for safe mode ) will do. It seems to me, that all the Mac startup key combinations that need a internet connection will not function Done without any difference > pressing "D" key does not function.ġ3.-15. Done without any difference > pressing "D" key does not function.ġ2. How could i do that ? Key-Code "D" does not function. Done without any difference > pressing "D" key does not function.ħ. Done without any difference > pressing "D" key does not function.Ħ. Done without any difference > pressing "D" key does not function.ĥ. How could i do that ? Key-Code "option+Command+P+R" does not function, same as "D" key. Done without any difference > pressing "D" key does not function.ģ. If you need to find an Apple Store - Find a Store - Apple.Ĭoncerning to Your Troublelshooting-List :ġ. If you get here without success then make an appointment at the Apple Genius Bar for service. If none of the above helps then see How to Downgrade macOS High Sierra and macOS Reversion- How to Downgrade from High Sierra.ġ5. Select Reinstall OS X and click on the Continue button.ġ4.Quit Disk Utility and return to the Utility Menu.Click on the Apply button, then wait for the Done button to activate and click on it.Set the Format type to APFS (for SSDs only) or Mac OS Extended (Journaled.).Click on the Erase icon in Disk Utility's toolbar.When Disk Utility loads select the drive (out-dented entry) from the Device list.Select Disk Utility from the Utility Menu and click on Continue button.Immediately after the chime hold down the Commandand Rkeys until the Apple logo appears. Erase and Install OS X Restart the computer.When the Utility Menu appears select Reinstall OS X then click on the Continue button. Reinstall OS X by booting from the Recovery HD using the Command and R keys.Download and install the OS X El Capitan 10.11.6 Combo Update or 10.12.6 Combo Update or Download macOS High Sierra 10.13.6 Combo Update as needed. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another. Upon completion log out of your current account then log into the new account. On the left under Current User click on the Add button under Login Options. Click on the lock icon and enter your Admin password when prompted. Create a New User Account Open Users & Groups preferences.Repair permissions on the Home folder: Resolve issues caused by changing the permissions of items in your home folder.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 Rkeys until the Utility Menu appears. Repair the disk by booting from the Recovery HD.How to invoke and interpret the Apple hardware tests - CNET. Use Apple Hardware Test to see if there is any hardware malfunction.Also, see Use safe mode to isolate issues with your Mac - Apple Support and Playing Safe- what does Safe mode do?. Test in safe mode to see if the problem persists, then restart normally. Reset your Startup Disk and Sound preferences.Reset the System Management Controller (SMC).Disconnect all third-party peripherals.Shutdown the computer, wait 30 seconds, restart the computer.You should try each, one at a time, then test to see if the problem is fixed before going on to the next.īe sure to backup your files before proceeding if possible. You need to pair it via BT for it to work correctly.Ī Troubleshooting Procedure that may Fix Problems with macOS El Capitan or Later Be sure to check your keyboard's connection to the computer.
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