There are two primary factors in the degradation of lithium-ion batteries. While I know many people simply enjoy complaining, perhaps a dose of knowledge will help ease misguided anger. I’ve come across lots of tweets, blog posts, and in-person comments regarding battery life on older devices after having upgraded to iOS 7. Author The Mac Admin Posted on OctoJanuCategories Apple, macOS Leave a comment on The Right OS For The Right Mac Understanding New Software With Old Batteries This is not a position I want to be in or that I recommend you place yourself in. If you choose to deploy an OS with unsupported modifications, you are ultimately personally responsible for every system failure. Vendor support is a key component in service level agreements. Even in the absence of such restrictions, my recommendation stands. Running a “hacked operating system” may run afoul of the organization’s operating rules either self-imposed or legally required. The people doing this are clever and deserving of “geek cred”, but I would never recommend using such a hacked distribution in a production environment. There are those in the community who, for various reasons, hack new releases of OS X, and insert components from the new release into a previous release in an effort to run an earlier operating system than Apple intended or supports on a particular Mac. See the link below for Apple’s explanation of OS X Recovery: The only 100% certain way to ensure an OS X installation is appropriate for and supported on a Mac computer is to use the OS X installer supplied by Apple for the computer in question, which includes a factory-installed Recovery System (Recovery HD) and OS X Internet Recovery. I say “generally correct”, because occasionally it isn’t, particularly when hardware and OS X releases come close together. I call this an “open secret” because you will find nothing in Apple’s documentation to support this claim, however it is generally correct. The apps “Install Mac OS X Lion.app”, “Install OS X Mountain Lion.app” and soon, “Install OS X Mavericks.app”, from the Mac App Store will install OS X on any Mac computer released prior the latest update to the OS X installer app used.An OS X installation that has had an update applied bearing the suffix “(Combo)”, as in “OS X Mountain Lion Update v10.8.5 (Combo)”, will usually support all hardware released prior to the update that meets the system requirements for the major OS X release, OS X Mountain Lion v10.8 in this example.There are two situations in which this generally applies. It is widely held in the Mac sysadmin community that once Apple releases a new version of OS X, this new version includes the software components necessary to support the new OS X version on earlier hardware. See the link below for Apple’s notes on this topic and a list of which OS X versions shipped with each Mac computer (note, as of this writing, the chart has not been updated to include 2013 iMac models). Answers to support requests will generally amount to “install the correct operating system”. Regardless of how well the install goes or whether or not the computer boots, Apple will not support this configuration. Installing an earlier version of OS X will either fail to install, fail to boot after installation, or cause unexpected issues after boot. On any particular Mac, the earliest version of OS X supported by Apple is the version that shipped with the Mac in question. Here, I hope to set a few things straight. There is a mountain of misinformation floating around the community and the Internet on this topic. Mavericks Installer CreationĪuthor The Mac Admin Posted on OctoJanuCategories Apple, macOS, Mavericks Leave a comment on Creating OS X Mavericks Install Media The Right OS For The Right MacĪ perennial topic of discussion amongst Mac system administrators is which operating system should be deployed to which Mac. See the screenshot below for the Terminal output from the command above. Replace “TargetVolumeName” with the name of the volume you want to turn into a bootable OS X Mavericks installation disk. With the desired volume mounted, open the Terminal application and execute the following command: sudo /Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia -volume /Volumes/TargetVolumeName -applicationpath /Applications/Install OS X Mavericks.app -nointeraction Note that this volume will be erased and reconfigured as an OS X installer. This volume needs to be able to hold at least 5.36 GB of data to house the install media. ![]() ![]() To create the install media, mount a volume that you would like to use as an install disk. In OS X Mavericks, Apple have provided a relatively simple command line tool for creating bootable install media. IT staff, and even consumers often want to have a physical bootable install disk for OS X.
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