If your MacBook Pro doesn’t turn on or start up

If your MacBook Pro freezes during startup, or you see a flashing question mark, or the screen is dark and the sleep indicator light is glowing steadily (not in sleep) The flashing question mark usually means that the computer can’t find the system software on the hard disk or any disks attached to the computer.

ÂÂ Wait a few seconds. If the computer doesn’t soon start up, shut it down by pressing and holding the power (®) button for about 8 to 10 seconds. Disconnect all external peripherals and try restarting by pressing the power (®) button while holding down the Option key. When your computer starts up, click the hard disk icon, and then click the right arrow. After the computer starts up, open System Preferences and click Startup Disk. Select a local Mac OS X System folder.

ÂÂ If the problem occurs frequently, you might need to reinstall your computer’s system software. See “Repairing, Restoring, or Reinstalling Mac OS X Software” on page 54.

If your MacBook Pro doesn’t turn on or start up

Try the following suggestions in order until your computer turns on:

ÂÂ Make sure the power adapter is plugged into the computer and into a functioning power outlet. Be sure to use the 60W MagSafe Power Adapter that came with your MacBook Pro. If the power adapter stops charging and you don’t see the indicator light on the MagSafe connector turn on when you plug in the power cord, try unplugging and replugging the power cord to reseat it, or try another power outlet.

ÂÂ Check whether the battery needs to be recharged. Press the small button on the left side of your computer. You should see one to eight lights indicating the battery’s level of charge. If a single indicator light is on, connect your power adapter to recharge. For more information about battery indicator lights, see page 54.

52Chapter 4 Problem, Meet Solution

MC976LL/A, MD101LL/A, MD104LL/A specifications

The Apple MC976LL/A, MC975LL/A, and Z0ML00003 represent pivotal advancements in Apple's line of MacBook Pro laptops, showcasing remarkable features and technologies that cater to both professional and casual users alike. These models, launched as part of Apple’s efforts to blend power with portability, have garnered significant attention due to their robust specifications and premium design.

The MC976LL/A, commonly known as the 15-inch Retina MacBook Pro, stands out with its stunning Retina Display. With a resolution of 2880 x 1800 pixels, it delivers incredibly sharp images and vibrant colors, making it ideal for graphic design, video editing, and high-definition media consumption. The model is powered by Intel's quad-core i7 processor, which ensures that it can handle demanding applications effortlessly, enhancing productivity for users in creative fields.

On the other hand, the MC975LL/A is often viewed as a slightly lower-spec variant but still offers considerable performance capabilities. It features a 15-inch display as well but comes with a slightly lower resolution. This model is equipped with a dual-core Intel Core i5 processor, offering a balance between performance and power consumption, making it a suitable option for students and professionals who may not require the highest specifications.

The Z0ML00003 is another noteworthy entry, often associated with higher-end configurations within the MacBook Pro lineup. This model typically comes with enhanced graphics options, including the NVIDIA GeForce GT 750M, which significantly boosts performance for graphic-intensive applications. This capability makes it particularly appealing to video editors and 3D designers who need a powerful GPU to streamline their workflows.

All three models feature Apple's innovative Flash storage, which results in lightning-fast boot times and quick access to applications. The integration of Thunderbolt technology further enhances connectivity options, allowing users to connect to high-speed devices and displays. Battery efficiency is also a significant characteristic across these models, with each designed to last up to a full day on a single charge, enhancing mobility for users on the go.

In summary, the Apple MC976LL/A, MC975LL/A, and Z0ML00003 models exemplify Apple's commitment to excellence, combining powerful hardware with advanced technologies. From stunning displays to high-performance processors and graphics, these MacBook Pro versions accommodate a wide range of user needs, solidifying their place in the laptop market. Whether for professional use or everyday tasks, these models continue to reflect the innovation and quality synonymous with the Apple brand.