upgrade help for a dinosaur!

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Had macs since the lc11, am now on iMac, dome type, which I love! Currently running 10.4.11 but stuff like Spotify will no longer run soon, so I need to upgrade. My specs are:

Machine Name: iMac
Machine Model: PowerMac4,2
CPU Type: PowerPC G4 (2.1)
Number Of CPUs: 1
CPU Speed: 700 MHz
L2 Cache (per CPU): 256 KB
Memory: 640 MB
Bus Speed: 100 MHz
Boot ROM Version: 4.3.5f1
Serial Number: QT2156HJMAY

Can I install 10.5 or above? and if so, where can I get it?
Regards and thanks
T
 

RavingMac

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Your Mac's Specs
16Gb Mac Mini 2018, 15" MacBook Pro 2012 1 TB SSD
Had macs since the lc11, am now on iMac, dome type, which I love! Currently running 10.4.11 but stuff like Spotify will no longer run soon, so I need to upgrade. My specs are:

Machine Name: iMac
Machine Model: PowerMac4,2
CPU Type: PowerPC G4 (2.1)
Number Of CPUs: 1
CPU Speed: 700 MHz
L2 Cache (per CPU): 256 KB
Memory: 640 MB
Bus Speed: 100 MHz
Boot ROM Version: 4.3.5f1
Serial Number: QT2156HJMAY

Can I install 10.5 or above? and if so, where can I get it?
Regards and thanks
T
Sorry, but according to MacTracker you are already running the latest OS your machine is capable of running. Looks like a hardware upgrade is your best and only choice.
 

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