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60

I’m going to jump out on a limb here and make the assumption that you’re probably a Chrome user and before you went away you updated Chrome. If so, you're probably the victim of a Chrome updater bug and your issues are not related to your Apple hardware nor a bug with macOS. NOTE: If you're running Mac OS X El Capitan or later and have not disabled SIP, ...


8

According to everymac.com, your Mac is a 2006 model which was discontinued January 8, 2008. (I made the assumption 2.66QX means 2.66 GHz Quad Core Xeon) This model originally was designed to run OS X 10.4.7. Since the Mac OS X v10.6.2 Update is dated Nov 9, 2009, I doubt the disc you have is the correct one for this model Mac. The OS X 10.7.5 (Lion) was ...


7

From what you’ve said, I agree it should work fine. My first guess would be to check the Startup Security Utility on the iMac Pro, a feature of the iMac Pro (and other T2 Security Chip enabled Macs) that allows Admin users the ability to enable/disable Secure Boot and also the option of allowing/disallowing External Boot. It’s the External Boot ...


7

Original answer As described in this support article, there are different ways to load macOS Recovery: cmd+R: Install the latest macOS that was installed on your Mac. alt+cmd+R: Upgrade to the latest macOS compatible with your Mac. shift+alt+cmd+R: Install the macOS that came with your Mac, or the closest version still available. I suggest ...


6

You can set NVRAM options from command line to boot into recovery: sudo nvram "recovery-boot-mode=unused" sudo reboot This will put your system into recovery mode. NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.


5

SOLVED: MacBook Will Not Start Up After macOS Update I have a MacBook pro running MacOS Mojave. For the past year or so, every time a new MacOS update rolls out, and is attempted to be installed on my MacBook, it ends up displaying the circle slash (Prohibitory Symbol). Rebooting still produces a prohibitory symbol. I’m still able to boot into recovery ...


4

To add here I had the similar situation. The steps I took: Boot in single mode. Run /sbin/fsck_hfs -drfy /dev/disk0s2 many times, it didn't help. In the output I noticed there is a circular link problem, the messages were something like parentID=334973 threadID=51569281. The file ids are actually inode numbers and correspond to real files. Run find / -inum ...


4

The answer to this depends on what exactly you mean by "controlled by". In particular it doesn't make sense to say that it is either controlled by "firmware" or "software" - as firmware is also software. You can define "controlled by" in two interesting ways in this context: Either (a) when is the first software to be run loaded in from disk (i.e. non-...


4

If you are able to repair you drive, then you will need to be running at least Sierra in order to mount the macOS partition on the SSD via USB. Below are two possible solutions. Using a Third Party Tool Since you already have the SSD connected as disk2 in a USB port, a simple solution would be to download and use gdisk. The current gdisk installer is ...


3

dmesg did not show me the entire boot log but only the last few 100 lines of it, which was not enough. What works for me (on macOS 10.12.6) to see all boot messages is this command: sudo log show --predicate "processID == 0" --start $(date "+%Y-%m-%d") --debug It shows all of today's kernel msgs, including the boot process. If you only want the msgs ...


3

FTW if anyone is experiencing this I solved it by running the “faulty” computer on target mode and using its disk a boot disk on another MBP did all the update process with no problem at all. Then restarted and it came back to life.


3

I had the same problem you described above. I was so happy that I found this post, because I almost decided to reinstall my MacbookPro (mid 2018). But I tried it again because I really wanted to use duet. And the second time I installed it, it worked perfectly! I had downloaded the latest version (2.0.5.0). When you install it duet asked you to add it to ...


3

I've just encountered the same problem on my 15" 2016 MacBook Pro running macOS 10.14.2 Mojave. While I expected it to take some time starting up it never came back to the login screen and here's how I solved the problem: Reboot into single user mode by pressing the cmd + s keys on startup. Note this not safe mode, it's single user mode. Once in single ...


3

What you have posted in your comments to your question, the download of High Sierra from the App Store is only c. 20mb. I have High Sierra on a iMac (21.5-inch, Mid 2011) and Get Info on my High Sierra download shows a size of 22,697,095 bytes (15.1 MB on disk). However, when downloading High Sierra from a iMac (21.5-inch, Late 2013) running Mojave results ...


3

I would guess 10.6.2 would be just fine to boot most MacPro with that model, so you might have a hardware issue or bad DVD. More specifically, there are 8 models with A1186 - so you might need to try OS between 10.4 but most of them would work with 10.6.8 - so I’d start with any 10.6 media you can get your hands on if you can’t get a serial number or more ...


3

Unless you jailbreak the phone, no...can't be done. The startup screen even ignores the accessibility settings.


3

The panic report you posted in your previous question indicates an unrecoverable error in the IOAcceleratorFamily kext while trying to communicate with the NVDAResman kext. This indicates a problem with the GPU, probably related to the weird firmware update you applied. I think you're out of luck at this point. Only Nvidia has software to downgrade a GPU ...


3

You need to take it to an Apple Store. The SecureBoot settings can't be changed unless there is a valid admin user, so you can't boot to an external. Recovery is your only other option, and that's not working. I had a similar issue with my 2018 Mini: I had to run the "Welcome to Mac" routine and create a new user before I could alter SecureBoot, even though ...


3

Those visual artifacts are very typical of a failing GPU. This looks pretty advanced and you can usually confirm by seeing an external display fail as well. It could be cabling or the LCD, but that’s far less likely. Super rare would be driver or software issue. Make sure you have a good backup in case when the GPU fails it takes down the logic board as ...


3

Reset NVRAM or PRAM on your Mac Settings that can be stored in NVRAM include sound volume, display resolution, startup disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac. Shut down your Mac, then turn it on and immediately press and hold these four ...


2

You need startup files for your target OS. 1) Plug the Linux Installer on a Windows OS (It will mount the EFI partition only) 2) Copy the contents to some shared place to access it in Mac 3) Mount the EFI partition on your MAC 4) Copy the Linux startup files alongside Apple folder


2

Just want to add a few things since Mojave and Recovery are substantially different than the old single user mode: Mac with T2 chips you can’t do Ctrl+S anymore. Go into Recovery mode thru Ctrl+R instead. This changes the mount point for the filesystem you intend to modify, so be careful with what you remove / change. when looking thru Library and System ...


2

If you have Little Snitch installed, then you need to make sure you update to the latest version, because there was an older version that caused a pause on boot, just as you are describing.


2

I just had this problem - solved simply by resetting the SMC. This takes around 30 seconds - definitely recommend that you try this first.


2

In this case, the APFS partition type had been changed by EaseUS utility. That is why only Windows showed up on startup. I used gdisk to repair this and everything is on place, with no harm to the data. How I repaired this? I booted to Windows on bootcamp, downloaded gdisk for windows, opened cmd(terminal) as the administrator, opened the directory of ...


2

Holding Opt [alt] at boot should show you all available boot drives. The "No bootable device..." message is most likely to be the windows failed install. If you're lucky, the Mac partition should be OK, but you'll probably have to do Boot Camp over from scratch.


2

Basically an unmodified Lenovo won't read the boot information on a mac os formatted drive, so this won't work. To read that mac drive, put it into an external drive enclosure and connect to a mac. Success here will also depend on having the user names and passwords as necessary.


2

If you can put the Mac's drive in an external USB enclosure there are utilities that you can purchase and install on your Windows PC to read and write the disk format of a Mac. For example Paragon Software has utilities to read and write both HFS+ and the new APFS disk formats on a Windows/Linux PC. This would enable your PC to access the Mac's drive and ...


2

Looks like it was just bad luck. Got a cable from Amazon here as recommended by Allan in the comments and installed it. It's been working for almost a month with no issues.


2

I have decided to sell the system. I'd like to know if I remove the hard drive (or in this case, an after-market SSD I've installed) from the system, will there be any other data (i.e. iCloud data) stored on the system on any other chip that I can reset in any way? Unless you actually wipe the SSD clean, you could potentially leave all sorts of ...


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