grub updates silently overwrite my bootloader

[Jeff Lane ]

I dual boot Xenial and OSX on a MacBook Air. I use rEFInd as my boot loader to manage them. However, every time there's a grub update, grub just silently overwrites my bootloader, which makes it so that I am unable to boot into OSX.

Grub updates should NOT overwrite the default bootloader, period. At the very least, it should halt installation and prompt the user with something like:

It looks like grub is not your current bootloader. Do you wish to replace your existing bootloader?

I installed rEFInd BEFORE I did the ubuntu install on this machine, so it predates even the Xenial installer. Thus I should not have to re-install rEFInd after every grub update.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: grub2-common 2.02~beta2-36ubuntu3.2
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Sep 6 16:12:43 2016
InstallationDate: Installed on 2015-10-21 (321 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151020)
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)