Can I use old iMac as monitor?

[zalle]

Hi guys,

I own a 2006 24" iMac, and a (slightly) newer Macbook Pro (2008).

Can I use the iMac's monitor with a third party software like this https://www.realvnc.com/products/vnc/ or like Synergy?

My biggest issue is I need Mountain Lion to install a program, but I need the big screen to use it properly.

Please don't tell me "just buy a new iMac". Thanks

 

[Samuelsan2001]

No target display mode did not come into play until 2009 see apples notes here.

https://support.apple.com/en-gb/HT204592

Your best bet might be to sell the iMac and use the money to buy monitor for your macbook.