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Available to current and newly accepted college students and their parents, as well as faculty, staff, and homeschool teachers of all grade levels.
Storage devices:
To help determine whether an issue is caused by software that loads as your Mac starts up, you can start up your Mac in safe mode.
The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.
NVRAM (or PRAM) is a small amount of memory that your Mac uses to store and quickly access certain system settings such as sound volume, display resolution, startup-disk selection, and time zone. These settings vary by Mac and the devices you're using with it.
If you think your Mac might have a hardware issue, you can use Apple Diagnostics to help determine which hardware component might be at fault. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.
Macs can perform slowly, too. If your Mac seems to be running slower than it should, the variety of tips here should help you identify and fix the problem. As with a Windows PC, there are many reasons a Mac might be slow. Stay away from programs that promise to “optimize” your Mac and make it run faster.
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These advanced steps are primarily for system administrators and other experienced users who are familiar with entering commands in Terminal.
Use About This Mac to find out which Mac operating system (macOS) is installed on your Mac, and learn whether it's the latest (newest, most recent) version.
Reset your Mac to factory settings to prepare it for a new owner.
Use macOS Recovery, your computer’s built-in recovery system, to reinstall the Mac operating system.
Download and install current or previous versions of the Mac operating system on compatible Mac computers.
To maintain your computer's security, stability, and compatibility, Apple recommends using the latest macOS that is compatible with your Mac.
You can use a USB flash drive or other secondary volume as a startup disk from which to install the Mac operating system. These steps are primarily for system administrators and other experienced users.
The message might say that an error occurred while downloading, preparing, or installing, or that the software is damaged, could not be verified, failed to personalize, or needs to be reinstalled. The cause of such messages can vary, and sometimes they're only temporary. Try these solutions.
Disk Utility can find and repair errors related to the formatting and directory structure of a Mac storage device. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
Self Service Repair is intended for individuals with the knowledge and experience to repair electronic devices. If you are experienced with the complexities of repairing electronic devices, Self Service Repair provides you with access to genuine Apple parts, tools, and repair manuals to perform your own out-of-warranty repair.