What if my Mac doesn't boot?

What do I do if my mac doesn't turn on? There are no Mac friends have ever had a Mac suddenly can not turn on the situation, that the hardware has been a failure very anxious to contact after-sales personnel, if your equipment over the warranty period may also need to pay maintenance, in fact, we do not have to worry, if everyone's Mac encountered can not boot, Battery failure, not charging and so on sudden failure, you can first try to reset the SMC, you can solve the problem. Let's teach you how to reset the SMC on your Mac.

Parameter random access memory (PRAM) and System Management Controller (SMC) control many hardware modules of MAC system, when a hardware module fails, performance is unable to boot, battery failure and so on, this time need to reset SMC, the following is the detailed operation steps.

One, the steps of the SMC are somewhat complex, each device type is different, such as the MacBook with removable batteries need to do this:

1. Shut down and unplug the power cord

2. Remove the battery

3. Press and hold the Power key for 5 seconds without releasing

4. Re-install the battery

5. Plug in the power cord

6. Boot

　　Second, the MacBook without removable battery:

1. Shut down, plug in the power cord

2. Press and hold SHIFT, Control, option, and the Power key

3. At the same time, release Shift, Control, Option three keys, keep holding down the power key does not move until the boot

　Third, for Mac Pro, intel-based IMac, intel-based Mac Mini, intel-based Xserve and other devices:

1. Shut down and unplug the power cord

2. Wait 15 seconds

3. Plug in the power cord again

4. Boot

After the above steps, if it is due to problems with the SMC Mac failure can be resolved immediately, if you still cannot solve your Mac failure, it may really need to contact the relevant after-sales maintenance personnel.