New answers tagged boot
0
If you have access to a working Mac, the next thing I would try (after what you have already done) is to start the troubled MacBook Pro in Target Disk Mode by powering on the computer and holding down the T key until the Thunderbolt (or USB) symbol appears on the screen. Then connect it to the working Mac, mount the drive, and use Disk Utility to to verify ...
0
Stuck at the Apple Logo. What to do.
This is an attempt to write a canonical QA for this issue, as per the Meta post: Where is the list of canonical questions stored for Ask Different? I expect it to be periodically edited with the goal of becoming a comprehensive information resource.
When you get stuck booting at the Apple logo, it can be really ...
0
I wanted to add that you will need to connect an external USB keyboard/mouse to use the live USB of gParted or CloneZilla on MacBook Pro 2016 or later
I know I'm a bit late, but I was searching for how to do this and this was the best post I found so wanted to note that.
0
... does anyone know if this machine has diagnostic LEDs like the older iMacs?
There are no diagnostic LEDs on the logic board.
I'm thinking it's definitely a hardware issue at this point but I don't know how to move forward, I figure I can at least recover the SSD.
This is a big jump in determination when two very conspicuous clues were presented:
A ...
0
The type GUID for partition 2 of /dev/sda is wrong. The commands below will correct the problem. Enter the commands in an Ubuntu terminal window.
sudo gdisk /dev/sda
t
2
AF0A
w
y
Note: I realize the gdisk output shows hybrid partitioning. However, both macOS and Ubuntu should ignore the 2nd, 3rd and 4th entries in the MBR partition table.
1
The type GUID for partition 2 of /dev/sda is wrong. The commands below will correct the problem. Enter the commands in an Ubuntu terminal window.
sudo gdisk /dev/sda
t
2
AF0A
w
y
0
You can try to run the installer on your USB directly in Recovery mode.
Open up terminal and enter: ls /volumes. Identify your USB, and then enter /volumes/<USB Name>/Install\ macOS\ Catalina.app/Contents/MacOS/InstallAssistant. The macOS installer should appear.
If it did not launch, you can copy your installation partition on the USB over to your ...
0
I am going to guess you ended up with a firmware password and aren’t seeing the images here due to some removals of OS that the system expected.
https://support.apple.com/en-us/HT204455
If so, you will need to get Apple to unlock the device by providing original proof of purchase if you can’t recall and enter the passwords that were entered into the T2 / ...
-1
I have the exact same problem with my 15" mid-2010 MacBook Pro. It does not suddenly reboot when in Safe Boot-- only in the normal boot. Apple is aware of this problem but will not assign even one engineer to look into this problem as I have been complaining to them for over 6 years about this.
I was told that possibly the battery needs to be changed- ...
0
You can't install via the (alternate) and (better) restore method if your Mac doesn't have APFS-supported firmware. It's right there in the link notes.
Then your recovery gives you the original you shipped with (in my case, Mavericks), and there is no way between here and the moon you can get a boot rom update to work if you don't have an internal SSD. I'...
1
Your guess is correct. The 2017 model Macs can only EFI boot Windows. Since the first partition on the external drive starts at sector 2, the drive does not have the space to convert from a MBR partition table scheme to a GUID partition table (GPT) scheme. This means you would need to restart the installation process.
When installing Windows 10, I would ...
1
One possible explanation is that Mojave is on an APFS volume, which Mountain Lion doesn't know about. It's possible that your Mac's firmware also needs updating if the APFS volume is not being shown in the Boot Manager thing (Option at Start).
Seemingly, you have managed to get Mojave booted somehow, so it's not an incompatibility/lack of support for your ...
1
Boot Process
Before you can be presented with a login screen, the OS must be booted. Granted, there can be "login items" which are apps or helpers that can be loaded after a user logs in, but the bulk of the OS (this includes the kernel and related drivers) has loaded by the time you get the login screen where you enter your username and password.
...
0
Chirps/Beeps might indicate a hardware failure on disk or RAM or the power supply. It likely needs to be serviced by either Apple or an authorized Apple repair center if it's under warranty. You can check the warranty and AppleCare coverage here
PS: If it's an older MacBook Air that is out of warranty or out of AppleCare coverage than a 3rd party repair ...
0
If you have a USB keyboard and have tried each port in a row, then the USB / logic board are the problem.
Even a PC keyboard will work to option boot - so even a PS/2 keyboard will work.
Using CMD on Very Old PC Keyboard During Boot
As above, only a quite rare keyboard won’t work with modifier keys that don’t work on Mac firmware.
0
Created my own solution last night.
Re-formatted external 4TB clean, then re-partitioned it with the first partition being 1.95TB and the second 2.05TB. From there I repeated the cloning of my two internal 2TB partitions to them. (Taking a cumulative 10 hours, that's no minor trial and error.)
Since the boot blocks of both systems reside within the first ...
0
I have functionally the exact same problem. Dual-boot internal SSD with Mountain Lion 10.8.5 and High Sierra 10.13.6 in a 2012 MacBook Pro (non-Retina). Both systems and both Recovery HDs boot fine. All are cloned to external HD in a USB 3.0 case.
External 10.8.5 and its Recovery HD boot fine. External 10.13.6 and its Recovery HD will not boot when chosen in ...
Top 50 recent answers are included
