I have a Macbook Pro 2014 with bootcamp partition to Windows 10. I decided to create a partition for data. I created and re-sized the partition in Disk Utility (OSX) but formatted it partition in using Windows, then all the boot options disappeared except for Windows.
The OSX partitions still show up as drives but it no longer shows as a boot option.
Using a ubuntu live disk I was able to get this information:
~$ sudo parted -l Model: ATA APPLE SSD SM0512 (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 20.5kB 210MB 210MB fat32 EFI System Partition boot 2 210MB 141GB 141GB hfs+ OSX msftdata 3 141GB 142GB 134MB Microsoft reserved partition 4 142GB 298GB 156GB ntfs NTFS msftdata 5 298GB 298GB 472MB ntfs hidden, diag 6 298GB 299GB 650MB hfs+ Recovery HD msftdata 7 299GB 500GB 201GB ntfs Basic data partition msftdata Model: Kingston DT 101 G2 (scsi) Disk /dev/sdc: 7803MB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 4129kB 7803MB 7799MB primary fat32 boot, lba
How do I get my computer to boot OSX again?