Dual booting, and lost rEFInd: how to recover OSX? I mostly followed [these instructions][1] for how to set up dual-booting on my macbook, and everything seemed fine, up to the very last step. Now when I reboot the system (even if I hold command-R) I don't get any rEFInd boot menu or recovery mode, it just boots to the Ubuntu partition and I have no way of booting into OSX, which means this is now just a single-boot option Ubuntu machine.
I suspect it may be because during the OSX partitioning, I created two partitions, and then consolidated them into one during the Ubuntu  installation phase.

What should I do from this point? 

Edit solved: From within Ubuntu, install refind again from the secondary installation. In case of Ubuntu:

sudo apt install refind


Let the program install to the partition that it wants to install to, then reboot, and you should see the rEFInd menu again.
You can try going into recovery mode like this and then follow these instructions..