Is it possible to upgrade drive to ssd?
I have just come into two Imac G5 A1058 1.8ghz and I was wondering if it would be possible to upgrade drive to an ssd?
While the SATA HD interface would allow the SSD to physically work. You'll encounter issues with the inability of the OS. OS-9 or OS-X Tiger the newest OS-X you can use on this system. Neither has the TRIM support for SSD's. That's not to say it wouldn't work just the SSD will wear out quicker.
Now the hard part - The cost and benefit of using a SSD's in this system don't make it the ideal choice of storage. I would stay with a standard HD drive if you need to get more storage and you may want to think about getting an external drive (needs to be FireWire) or a NAS server via Ethernet. So your investment can be reused with a newer system later on.