Hold down Command ⌘ + Option + P + R together.Then hold down Command ⌘ + Option + P + R keys together. Information stored in the PRAM or NVRAM include your startup disk, disk caches, RAM disks, virtual memory, volume, video and display information, 32-bit addressing, time zone information, mouse scaling and speed, system fonts and more. For most purposes, this is interchangeable and the steps to reset are the same. NVRAM or Non Volatile Random Access Memory also stores information on a memory chip. PRAM stands for Parameter RAM and holds information about your Mac to do specific functions. However, if you find you have additional issues that come up such as a flickering screen, you will probably need to do both steps. There are basically two steps that you can take - reset the PRAM/ NVRAM and reset the SMC. Sharing files and even accessing your email can be impossible when you are not connected. We all use the Internet for communicating and researching throughout the day. Most computers today, including desktops are usually connected to the Internet via wireless networking so getting this message can be very frustrating. Sometimes Mac users have run into an unexpected snafu where they realize they cannot connect to their WiFi and get an error message ‘Wi Fi No Hardware Installed.” This message appears when you click on the Wi-Fi symbol on the upper right of your screen. This error message may appear on MacOS laptops.
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