Can I use a mini displayport cabel to connect my macbook air(2015) to an old iMac(2009) and use as a screen?
Can I use a mini displayport cabel to connect my macbook air(2015) to an old iMac(2009) and use as a screen?
MacBook Air
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Read this very carefully, and see if it applies to you:
Use your iMac as a display with target display mode - Apple Support