This file includes the System Maintenance Utility Installation package for the HP Designjet 30, 70, 90, 100, 110plus, 130 and 111 Printer series. Description: Designjet System Maintenance Utility driver for HP Designjet 110plus This file includes the System Maintenance Utility Installation package for the HP Designjet 30, 70, 90, 100, 110plus, 130 and 111. ![]() Have you ever experienced or heard about Mac which gets stuck on grey screen with Apple logo and a progress bar during boot process or has it ever happened with you that your Mac doesn’t boot and stalls on the grey screen at startup just after you upgraded to macOS Sierra or El Capitan. If you are experiencing any of these problems and looking for a solution. Free pdf editor for mac. Then trust me this will be the best organized article for you to fix Mac grey screen issue and recover from no boot situation while saving your precious data. This article focuses on issue when Mac boot process stucks on Grey Screen with apple logo. Mac boot process stucks on grey screen with Apple logo and a progress bar Though, It’s a rare problem but I am sure most of the Mac users might have experienced it at least once. There is no doubt that Apple provides its customers with the best piece of hardware for a beautiful user experience but still as we know, nobody is perfect in this world and Mac is just a machine and so can malfunction at times. Problems can be of different types but the problem at startup is most frustrating that makes you lame and cripples you the most especially when you have some important data in your computer. This article focuses on solving Mac grey screen problems or no boot situation after upgrading to macOS Sierra or El Capitan. Different people call it by different names but no matter what you call it, the solution to all the following problems would be the same. As soon as you press the Power button to turn the Mac on, it initializes the small program code called BootROM which controls two other sub programs called POST and EFI. They basically checks and activate all the connected hardware components essential to boot your Mac. As it does the POST, the Display remains black until the BootROM sends a video check signal which turns the screen grey. EFI selects the preferred operating system partition to use and then passes the control over to Boot Loader called Boot.efi. 2). Executing Boot Loader. Once the Boot.efi is loaded, it draws the “Apple logo” on the screen. The primary job of this Boot.efi file is to load the essential kernel extensions (hardware drivers also known as kexts) from its cache folder located in /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache directory into main memory(RAM) and then allow the kernel to take over the system. Boot Loader starts loading the kernel extensions, a progress bar or spinning wheel appears underneath the Apple Logo on the screen indicating the progress in boot process. 3). Kernel Initialization and Rooting When all the essential kernel extensions have been loaded by boot loader, it passes the control over to recently loaded kernel extensions and the user still sees the screen with grey Apple logo with a loading bar. This phase is known as Kernel initialization and the loaded kernels start loading additional drivers and the core BSD Unix system necessary to boot a Mac and then later it initializes the I/O Kit which links the loaded drivers into the kernel. At this stage the screen changes to a dark grey spinning gear right below the Apple logo. It finally mounts the System partition which is known as rooting and then passes the control over to the root system processes which show the login screen and create user interface and environment. At this stage, the dark grey Apple logo is replaced by the login window or the user’s desktop background if the auto login is enabled. Read the post ““ if you want to learn in depth. Now let’s move on to the next topic which discusses about the reasons behind “Mac grey screen” Startup Problem or Mac stalling at Apple Logo with grey screen. Reasons behind Grey Screen Startup Problem or Mac stalling at Apple Logo: Macs can stuck at startup due to various reasons and show different screen in every situation. This problem can occur anytime not just after upgrading to macOS Sierra but due to other various reasons as well. If you are seeing a dark grey screen with a loading bar stuck at 75 percent, or a spinning gear just underneath the Apple Logo then it is most likely that your Mac is having trouble loading kexts, drivers, or other system processes. But if you are seeing a spinning globe, a prohibitory sign, a grey screen with a flashing question mark on a folder icon, or just a black or very dark display instead, then it could be a sign of corrupt macOS, startup disk failure or any other hardware issue. This article is mainly focused on the start up problem which shows a dark grey screen with a loading bar or a spinning gear just below Apple Logo.
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