Take a risk and test it yourself, and it’s successful. The approximate steps are:
Download the ISO file of 14.04 in Ubuntu environment
Without mounting USB: dd if=ubuntu.iso of=/dev/sdb
Enter GParted of LiveCD and delete UEFI and HFS+ irrelevant partitions
Enter the Disk Utility of OS X, drag and drop the partition size, Apply
Attention
I have three remaining partitions in GParted
The first Boot partition seems to be marked as UEFI (not entirely sure, but the mark is identifiable)
The second and third are HFS+ partitions, and the third is marked Recovery
I failed once when applying Apply after adjusting the partition, but succeeded the second time, but the steps are the same
If you have dual systems of ubuntu and mac, first install grub into the partition where the mac system is located, then modify the configuration file, delete ubuntu, and then format the hard drive where ubuntu is located. If you upgrade, generally the grub configuration will not change much, so it is basically no problem.
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Take a risk and test it yourself, and it’s successful. The approximate steps are:
dd if=ubuntu.iso of=/dev/sdbAttention
I have three remaining partitions in GParted
The first Boot partition seems to be marked as UEFI (not entirely sure, but the mark is identifiable)
The second and third are HFS+ partitions, and the third is marked Recovery
I failed once when applying Apply after adjusting the partition, but succeeded the second time, but the steps are the same
If you have dual systems of ubuntu and mac, first install grub into the partition where the mac system is located, then modify the configuration file, delete ubuntu, and then format the hard drive where ubuntu is located. If you upgrade, generally the grub configuration will not change much, so it is basically no problem.