Relax,Take your time, if you do not understand something ask in the correct forums, depending on your question, it may take a day or so for one of our specialist to reply.
It can be done relatively easy But its not something many of us would do,[ most of us would save our files and folders to an external source and do a clean installation] the routeen to run the upgrade is done via the terminal follow the steps below [enter after each command and add password if...
There is a recent post in the Ubuntu forums on how to set up your USB to RGB converter cable [this should also work for Mint 21]
https://ubuntuforums.org/showthread.php?t=2497083
HI
1] updating from U18 to the latest version is a big jump, a clean re-install may be best
2] once you have done a clean re-installation and run the updates, then install “Timeshift” [or similar]
3] most of us will turn on the fire wall and configure to our own needs, some will run "Clam AV"...
@Toshmarple
dont give up yet, its had windows 8.1 or higher on it so just make sure you have disabled windows quick start and windows secure boot in the bios, be aware of what i have said 2 post up from here.
Now I will give you a link, this should work for most Ubuntu based distribution...
The Ideal pad for windows has some peculiarities the following are some of them..
Select MRB partition from BIOS
if using Bios then use NTFS file system, if using UEFI choose Fats 32
make sure you enable both legacy support and USB first boot in the bios
boot the usb [let it do its thing] then...
@noelw
this has been an on going problem with I-mac sound, I have found this it goes further than i normally do, [YOU do not need to install INXI as it is already installed in Mint]
https://itsfoss.com/fix-sound-ubuntu-1304-quick-tip/
Oh I was not expecting that, will need to think... if your i-mac has the cirris chipset for sound then there was an updated driver put out a couple of months back https://github.com/davidjo/snd_hda_macbookpro, but i will keep thinking
Sounds like the updates in the kernel have a corruption of some sort [it may not affect all machines]
if all else fails try.. [sorry, this may be a pain in the butt]
sudo apt-get remove --purge alsa-base pulseaudio [this will compleatly remove the current...
No you have MINT, and it doesn't matter if it's Mint21 mate mint 21 cinnamon or Mint LMDE, it comes already installed and configured [if it wasn't then you would not have been able to run the commands]