If you use both Ubuntu and Mac OS on your Mac laptop and have upgraded the Mac OS X version to Yosemite,
You may see an error claiming that the bootloader has been rewritten and you can no longer dual boot issue with Yosemite and Ubuntu
This article will go through how to fix if you are experiencing this problem.
1 How to fix the dual boot issue with Yosemite and Ubuntu?
How to fix the dual boot issue with Yosemite and Ubuntu?
If you are experiencing this problem, here is how to resolve it:
- Using rEFInd boot manager Boot from another device
Let us go through both the solution in detail:
Solution 1: Using rEFInd boot manager
Download rEFInd from its Sourceforge website on OSX Yosemite. Extract the compressed file. You should see a folder called “refind-bin-0.8.3.”
Look for an “install.sh” file within the folder. Next, launch a Terminal. Enter sudo, then drag the “install.sh” file to the terminal and add –esp to the end of the script. This is how it should look: sudo /path/to/refind/folder/install.sh —esp
That’s all there is to it; you’re done. Now restart/reboot your Mac, and you should be able to select Ubuntu and boot into it without issue.
Solution 2: Boot from another device
Another solution is to boot from another device or enter Internet Recovery Mode before modifying the CoreStorage disk through the command line.
Back up your data. Remove any external drives (especially your external Time Machine backup drive). At startup, press alt+ cmd + R to enter Internet Recovery Mode. The current firmware update must be installed, as well as ethernet or WLAN (WPA/WPA2) connectivity and a router with DHCP enabled. On a 50 Mbps connection, it takes roughly 4 minutes to boot to a recovery netboot image, which is often loaded from an apple/akamai server. Ethernet is preferred because it is more dependable. If you are limited to WIFI and the boot process fails, simply restart your Mac until the boot process succeeds. You may also start from a bootable installation thumb drive (Mavericks or Yosemite) or a thumb drive containing the entire system (Mavericks or Yosemite).
Utilities/Terminal should be open on the menubar. Enter the diskutil cs list command. Run diskutil cs resize. Stack the LVUUID size with the LVUUID: The logical volume’s UUID and size: the final size of your Macintosh HD Eg: diskutil cs resizeStack DC2473AF-0833-4DBD-BF8F-D5D60063554A 200g Enter “exit” to close Terminal. Restart your primary volume. Begin installing Ubuntu on the now-free storage space.
That concludes the Dual Boot Issue With Yosemite and Ubuntu. I’ve gathered all the facts to help you solve this problem. Apply each of the above strategies, one at a time, with caution.
Hopefully, this post has assisted you in resolving the sound icon not working issue and that you can now regulate the volume as needed.