I have installed Ubuntu on my Mac. But then after a few times, neither can I boot to Ubuntu nor can I find where it actually is. Total a mystery. Now I actually try to erase this part in my computer. But I don't know where to start. Even in Disk Utility I do not see the space it takes. Here is a screenshot:
Please advise me how to erase Ubuntu and release the space. My internal SSD has a total size of 251 GB. But now I can only see 165 GB of it.
Thank PSN for his advice.But something weird just happened again.. This is what happened in my terminal when I tried to install the rEFInd:
dhcp-10-176-3-41:~ anthony$ /Users/anthony/Downloads/refind-bin-0.10.0/refind-install Not running as root; attempting to elevate privileges via sudo.... ShimSource is none Installing rEFInd on OS X.... Installing rEFInd to the partition mounted at /Volumes/ESP Found rEFInd installation in /Volumes/ESP/EFI/refind; upgrading it.
**** ALERT: SIP ENABLED! ****
You are attempting to upgrade an existing installation, but it appears that System Integrity Protection (SIP) is enabled. If rEFInd is working now, then this is fine; you can upgrade your existing rEFInd. If rEFInd is not working, though, re-installing from this boot will not help. To re-enable rEFInd, you must re-install it from a Recovery system or from another OS. To enter the Recovery system and re-install rEFInd:
- Hold down Command+R as the chime sounds
- When the OS has booted, select Utilities->Terminal
- Change to this directory with the 'cd' command; it will probably be under /Volumes/Macintosch/Users/anthony
- Re-run this script.
For more on this subject, see http://www.rodsbooks.com/refind/sip.html
Do you want to attempt installation (Y/N)? y Copied rEFInd binary files
Notice: Backed up existing icons directory as icons-backup. Existing refind.conf file found; copying sample file as refind.conf-sample to avoid overwriting your customizations.
Could not set boot device property: 0xe00002bc
WARNING: If you have an Advanced Format disk, DO NOT attempt to check the bless status with 'bless --info', since this is known to cause disk corruption on some systems!!
ALERT: Installation has completed, but problems were detected. Review the output for error messages and take corrective measures as necessary. You may need to re-run this script or install manually before rEFInd will work.
Unmounting install dir Volume EFI on disk0s1 unmounted