How to change "read-only file system" , taking ownership

[benjilb]

Hello,
I have the exact same problem as the one described here by mguardzi. I have not been able to solve it.
I have entered the "mount | grep -i snap" command. Here is what it outputs :

/var/lib/snapd/snaps/vuze-vs_2.snap on /snap/vuze-vs/2 type squashfs (ro,nodev,relatime)
/var/lib/snapd/snaps/core_4206.snap on /snap/core/4206 type squashfs (ro,nodev,relatime)

What does it mean ? Is it normal ? What can I do ?

Some info about my system :
Ubuntu 16.04 LTS
Computer : old MacBook Pro
Processor Intel Core i5-2435M CPU @ 2.40 GHz x 4
OS type 64-bit
Disk 488.0 GB

The version of vuze that I was trying to install : i do not know. I just downloaded it from the vuze website today, so I guess it is the latest.

Thank you very much for your help.

[QIII]

Moved Apple Hardware Users from https://ubuntuforums.org/showthread.php?t=2374973