It involves the use of the address resolution protocol (ARP), which converts Internet protocol (IP) addresses into the MAC address.Who am I to write this? I’m the Director of Engineering for a startup transitioning from a small to a medium-sized business, and we’ve grown to a fair number of employees while not forming any sort of IT department. I couldn't find it via Spotlight on my machine, as per above screenshot this is despite the fact that Spotlight has (supposedly) finished indexing my machine.Finding the media access control (MAC) address, or hardware address, for the hosts on your network is a fairly simple process. To convert a DMG file to ISO in Windows, you will need a special utility.I've just updated to sierra (10.12) and Network Utility appears in Utilities on my iMac (late 2015) Do a spot light search for it, double click or hold the command key to reveal the path. After the amount of responses my last blog post on the mysterious “ too many corpses” error on macOS Sierra and High Sierra, I realized there was a need to do an ultimate guide on recovering macOS, going step by step through the different ways to do so from easiest and least risky to the hardest and last resort options.On some older Macs, Internet recovery is done with key combo shift + option +. A loadable kernel module is an object file containing the necessary code to extend the running kernel, also known. Kext Utility is a handy and very easy-to-use Mac application with support for OS X Mavericks, Yosemite, El Capitan and macOS Sierra that helps you install numerous kext files at the same time with little to no effort from your part.Even a crumb of food or a stray hair can cause a key (including the Power key) to become unresponsive. You’ve been warned.Let’s start by going through the symptoms one by one: Common Symptoms MacBook Pro Power Button Stops WorkingIf you have a new MacBook or MacBook Pro with butterfly switches (the new style keys with very little travel), it’s possible something got caught into the switch. Following these instructions could recover your Mac but could also destroy your data. Samsung makes a inexpensive 128GB flash drive that’ll work great for 128GB MacBook and MacBook Airs and Seagate makes a 1TB external drive that’ll work great for anything larger.For everything that’s about to follow, you should have backups. And, on a final note, the best way to protect your data is to keep frequent backups. I’ll write more about some of the other battle-tested solutions I’ve discovered over the coming week as well.Let me know if you find this useful, or if anything is unclear or missing and I’ll update it.If it doesn’t, and you’re sure you’re getting AC power, you’ll need a new adapter and it’s likely your MacBook has a dead battery. Mac Doesn’t Power On At All (no chime, no Apple logo)If you’re using a MagSafe connector, make sure the light turns green when plugged in. Failing that you’ll need to contact Apple Support as the keyboard on new MacBooks and MacBook Pros are non-user serviceable.If not, check the cabling and connections and make sure you have AC power. If a new or borrowed cable works, you’ve found your issue.If you’re on an iMac, especially an older iMac, there’s surge protection within the iMac and you should try unplugging for 2 minutes and then plugging back in to see if it then turns on correctly. The best bet is if you’re sure you’re getting power to try another cable.
Network Utility Sierra Code To ExtendLeave it for an hour, if a time remaining indicator hasn’t appeared by then continue with the instructions below.Try clearing your NVRAM. The upgrade from Sierra to High Sierra took about 3 hours on one of my machines. IMac/MacBook Boot Hangs on Apple LogoFirst, is there a progress bar? If there is and it’s progressing, there’s a chance the Mac is installing updates. Mac Chimes Over and OverThis may signal a lack of good power connection or improperly inserted RAM, follow the steps for Mac Doesn’t Power On At All above to rule them out.Lastly, it’s also possible the bootloader is corrupted, in which case you’ll want to follow the Booting Into Recovery instructions below. If it’s a Mac with user-serviceable RAM, double-check the RAM is properly inserted and, if possible reseat it to make sure some corrosion hasn’t caused a lack of contact. ![]() To do this, boot into recovery and then enter Disk Utility as in Stage 1 to mount your internal drive.If your are able to mount your internal drive from Disk Utility a reinstall should keep your user profile and applications in tact and only reinstall the core OS. Stage 2: Reinstall macOSIf Stage 1 fails, your next option is to reinstall. If you have a backup and are ready to start from scratch skip right to Stage 3. You’ll want to look into recovery options if you don’t have a current backup. If all succeeds, reboot and cross your fingers.If you can’t mount your internal drive, there’s a good chance it’s corrupt. ![]() Then close Disk Utility, and run Install macOS. Select “Mac OS Extended” as the type and format the drive. Select it, and choose Format from the toolbar. You’ll see an internal drive named something like “Container 0”. Close Disk Utility and then re-open Disk Utility. If you have a retina display is output is going to be incredibly small, you’ll want to keep your glasses handy. Boot into Verbose ModeThink of Verbose Mode as your Mac laying on a couch and telling you everything about what it’s doing. Press down all four at once until you hear the second chime or the Apple logo appears and disappears twice, then release. Next, keep the Command (⌘)-Option (⌥)-P-R keys pressed down as you power on again. T shirt making software for macYou should set console logs scroll by as your Mac attempts to boot.If you’re having boot trouble, you’ll want to focus on the last 5 or so lines and look for errors. Next, keep the Command (⌘)-V keys pressed down as you power on again. Hold down the power button for 10 seconds to force a shut down if needed. This will take a bit longer to load up, as the recovery image is downloaded from Apple. Follow the instructions as above but this time hold Command (⌘)-Shift (⇧)-R while starting up. Via the InternetIf the Recovery Partition isn’t working or you want to gain access to the newest OS recovery partition for your Mac internet recovery is for you. From here, you can follow the Recover, Reinstall or Hard Reinstall instructions above. Boot into Recovery Mode Via the Recovery PartitionIf your drive is intact, shutting down the (holding down the power button for 10 seconds if necessary) and then holding Command (⌘)-R as you start it back up will bring you into the recovery environment. Select the Install disk when it appears in the list, which may take up to a minute. To make a recovery USB drive, make sure to get a 8GB or higher capacity drive, download the macOS installer from the App Store on a working Mac, and use the Install Disk Creator tool to generate it.To use a USB recovery drive, insert the drive into your Mac and hold down the Option (⌥) key while starting your machine. For specific recovery cases (like a corrupted APFS Preboot) you must boot using this method to change the primary disk. Via a Flash DriveIf you’re a prepper or have a friend who’s willing down to download the 8-10GB installer for the version of macOS you want from the App Store, you can make a USB recovery drive and boot from that. Once connected, an Internet Recovery option will appear you can select and boot from. You should get prompted with a screen asking what drive to boot from and offering to let you connect to the network wirelessly or automatically connecting if Ethernet is available.
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