Hi Everyone,
I just bought an Imac 27 late 2015, with 1 SSD of 23Gb and one HDD of 1TB.
Sierra is installed on SSD and i want to upgrade to Catalina.
It says that there's no space enough.
After 1 hour of research on google, i didn't found a clear explanaition for that.
Anyone can help ?
Thanks
iMac Line (2012 and Later)
It sounds like someone sold you an iMac with a split Fusion drive. Either they left it that way on purpose or didn't know how to fix it. You could try repairing it. Make sure you have a backup.
How to fix a split Fusion Drive - Apple Support
It sounds like someone sold you an iMac with a split Fusion drive. Either they left it that way on purpose or didn't know how to fix it. You could try repairing it. Make sure you have a backup.
How to fix a split Fusion Drive - Apple Support
Are you saying you have a split Fusion Drive? Normally macOS would be installed on the HDD. You need approx. 20GB free space to install Catalina.
The only way I know is to fix it is from Recovery Mode following the instructions from the page I linked. Maybe someone else will have a different idea.
Ok thanks for your answer.
Actually Sierra is installed on SSD, and only 9GB of free space.
The thing is that i didn't found a way to boot on the HDD, it does not appear as a bootable drive.
Do you know how to do it ?
Tried many ways and it looks like i can't unmount disk1 (wich is the SSD partition)
Got an error : -69888: Couldn't unmount disk
I tried :
Everytime i got this error...
Any idea ?
Ok cool, the good new is that i just got it today, so no need to backup anything !
Gonna try and keep you informed
Okay. Good luck.
Not enough space on SSD to upgrade to Catalina
