macos boot broken after installing 18.04
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I installed 18.04 a few weeks ago as a third partition on my Macbook Pro, which had High Sierra and 16.04. I noticed that rather than defaulting to refind, the boot loader was Ubuntu's and had 18.04 and 16.04 as the boot options. I'm trying to boot back into my mac now, but I can't seem to get that to work. Holding down alt at startup produces a black screen with a small white cursor. Holding shift to boot into safe mode just defaults back to the Ubuntu boot loader.
Holding command+R does get me to Mac's recovery mode, though. I tried resetting PRAM, which just ended up resetting the volume so I can hear the mac boot tone. I'm not sure where to continue - this either has to do with having a third partition (which I've never had before) or with have 18.04. I've read a bunch of other threads, but the symptoms don't match mine exactly. Any help would be appreciated!
EDIT: Here is my fdisk output where the 56.5 G disk should be the macos
Device Start End Sectors Size Type
/dev/sda1 40 409639 409600 200M EFI System
/dev/sda2 409640 118846519 118436880 56.5G unknown
/dev/sda3 118846520 314219566 195373047 93.2G Microsoft basic data
/dev/sda4 314482464 489972698 175490235 83.7G Linux filesystem
16.04 dual-boot mac 18.04
asked May 3 at 14:46
amstrudy
15
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down vote
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I installed 18.04 a few weeks ago as a third partition on my Macbook Pro, which had High Sierra and 16.04. I noticed that rather than defaulting to refind, the boot loader was Ubuntu's and had 18.04 and 16.04 as the boot options. I'm trying to boot back into my mac now, but I can't seem to get that to work. Holding down alt at startup produces a black screen with a small white cursor. Holding shift to boot into safe mode just defaults back to the Ubuntu boot loader.
Holding command+R does get me to Mac's recovery mode, though. I tried resetting PRAM, which just ended up resetting the volume so I can hear the mac boot tone. I'm not sure where to continue - this either has to do with having a third partition (which I've never had before) or with have 18.04. I've read a bunch of other threads, but the symptoms don't match mine exactly. Any help would be appreciated!
EDIT: Here is my fdisk output where the 56.5 G disk should be the macos
Device Start End Sectors Size Type
/dev/sda1 40 409639 409600 200M EFI System
/dev/sda2 409640 118846519 118436880 56.5G unknown
/dev/sda3 118846520 314219566 195373047 93.2G Microsoft basic data
/dev/sda4 314482464 489972698 175490235 83.7G Linux filesystem
16.04 dual-boot mac 18.04
asked May 3 at 14:46
amstrudy
15
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I installed 18.04 a few weeks ago as a third partition on my Macbook Pro, which had High Sierra and 16.04. I noticed that rather than defaulting to refind, the boot loader was Ubuntu's and had 18.04 and 16.04 as the boot options. I'm trying to boot back into my mac now, but I can't seem to get that to work. Holding down alt at startup produces a black screen with a small white cursor. Holding shift to boot into safe mode just defaults back to the Ubuntu boot loader.
Holding command+R does get me to Mac's recovery mode, though. I tried resetting PRAM, which just ended up resetting the volume so I can hear the mac boot tone. I'm not sure where to continue - this either has to do with having a third partition (which I've never had before) or with have 18.04. I've read a bunch of other threads, but the symptoms don't match mine exactly. Any help would be appreciated!
EDIT: Here is my fdisk output where the 56.5 G disk should be the macos
Device Start End Sectors Size Type
/dev/sda1 40 409639 409600 200M EFI System
/dev/sda2 409640 118846519 118436880 56.5G unknown
/dev/sda3 118846520 314219566 195373047 93.2G Microsoft basic data
/dev/sda4 314482464 489972698 175490235 83.7G Linux filesystem
16.04 dual-boot mac 18.04
asked May 3 at 14:46
amstrudy
15
I installed 18.04 a few weeks ago as a third partition on my Macbook Pro, which had High Sierra and 16.04. I noticed that rather than defaulting to refind, the boot loader was Ubuntu's and had 18.04 and 16.04 as the boot options. I'm trying to boot back into my mac now, but I can't seem to get that to work. Holding down alt at startup produces a black screen with a small white cursor. Holding shift to boot into safe mode just defaults back to the Ubuntu boot loader.
Holding command+R does get me to Mac's recovery mode, though. I tried resetting PRAM, which just ended up resetting the volume so I can hear the mac boot tone. I'm not sure where to continue - this either has to do with having a third partition (which I've never had before) or with have 18.04. I've read a bunch of other threads, but the symptoms don't match mine exactly. Any help would be appreciated!
EDIT: Here is my fdisk output where the 56.5 G disk should be the macos
Device Start End Sectors Size Type
/dev/sda1 40 409639 409600 200M EFI System
/dev/sda2 409640 118846519 118436880 56.5G unknown
/dev/sda3 118846520 314219566 195373047 93.2G Microsoft basic data
/dev/sda4 314482464 489972698 175490235 83.7G Linux filesystem
16.04 dual-boot mac 18.04
asked May 3 at 14:46
amstrudy
15
edited May 3 at 15:09
asked May 3 at 14:46
amstrudy
15
asked May 3 at 14:46
amstrudy
15
asked May 3 at 14:46
amstrudy
15
15
add a comment |Â
add a comment |Â
1 Answer
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Assuming all boot devices are detached when you boot, you would need to have the boot manager re-installed.
answered May 7 at 23:22
Reza Rahemi
9911
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1 Answer
1
active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Assuming all boot devices are detached when you boot, you would need to have the boot manager re-installed.
answered May 7 at 23:22
Reza Rahemi
9911
add a comment |Â
up vote
0
down vote
Assuming all boot devices are detached when you boot, you would need to have the boot manager re-installed.
answered May 7 at 23:22
Reza Rahemi
9911
add a comment |Â
up vote
0
down vote
up vote
0
down vote
Assuming all boot devices are detached when you boot, you would need to have the boot manager re-installed.
answered May 7 at 23:22
Reza Rahemi
9911
Assuming all boot devices are detached when you boot, you would need to have the boot manager re-installed.
answered May 7 at 23:22
Reza Rahemi
9911
answered May 7 at 23:22
Reza Rahemi
9911
answered May 7 at 23:22
Reza Rahemi
9911
answered May 7 at 23:22
Reza Rahemi
9911
9911
add a comment |Â
add a comment |Â
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