After upgrading from High Sierra 10.13.x (can't remember) to High Sierra 10.13.6, something went wrong with the boot partition. When turned on the MacBook shows the forbidden sign. However when I press and hold the Command key, it boots normally. So far so good, however in macOS safari and chrome are only showing blank pages, so I guess I re-install of macOS is a good idea. In order to do that you need to press CommandR during boot, but when I press anything more than Command only, the forbidden sign shows again.
fdisk shows:
Disk: /dev/disk0 geometry: 19457/255/63 [312581808 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 1023 254 63 - 1023 254 63 [ 1 - 312581807] <Unknown ID>
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
Diskutil shows:
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *160.0 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Heinen 159.2 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
Does anybody know how to fix this?
Thanks in advance. Gerben
