Resetting the System Management Controller (SMC). Shut down the computer.Press the power button to turn it back on and immediately after pressing the power button, hold down the Command(Apple), Option, P, and R – all the four keys together on the left hand side of the keyboard and keep them hold until you hear 3 loud buzzing (or Chimes).Let go off the keys after 3rd buzzing sound and let the computer be restarted normally.

You can find reset instructions for both here: If you are experiencing issues with powering on your computer, sleep, wake, charging your Mac notebook battery, or other power-related symptoms, you might need to reset the SMC instead. Power related settings can be controlled by the System Management Controller (SMC) on your Mac. The settings that are stored in NVRAM depend on the type of Mac you’re using, and the types of devices connected to it. Select the volume to which you want to install the Adobe application, and then click Repair Disk Permissions.Ī small amount of your computer’s memory, called “non-volatile random-access memory” or NVRAM, stores certain settings in a location that OS X can access quickly.Select the volume in the left pane for which you want to repair permissions.Disk Utility lets you verify and repair Mac OS X disks and permissions issues.To repair Disk permissions follow the below mentioned steps. Sometimes these permissions on system files differ from what it should be and this is what we repair using Disk Utility. A permission allows one application to “talk” with another application and so OS X wants permissions and ownership to be accurate and enabled to function properly. Run Disk Utility and Repair Disk Permissionīefore starting any troubleshooting, I would recommend you to repair disk permissions as it solves hundreds of problems. What to do if CD / DVD Drive on my Mac keeps ejecting every CD / DVD 1. I am going to share the complete troubleshooting for this “CD / DVD keeps ejecting on Mac” issue which could be result of various reason like dust on lens,OS X issue, hardware fault. When I inserted any DVD in the external CD / DVD drive it did the same thing- ejected it.It keeps ejecting the CD / DVD automatically.Then I thought it must be a software problem so I did a research and found various troubleshooting steps to fix it.

I thought its my CD / DVD drive which is faulty and needs to be replaced so I plugged in a USB CD / DVD drive to my Mac that I had purchased long time ago.

My drive was working normal earlier today, then it went crazy. it sounds as though it is trying to read the disc, but fails. Soon after I put a CD or DVD in the drive, it spits it back out. My CD/ DVD drive on my iMac is going crazy.

Optical drive for mac not working