Linking my phone with my mac
How can I link my phone with my Mac?
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I'm not certain precisely what you mean by link.
Such of the data can automatically sync between the devices via iCloud (e.g., iCloud Photos, iCloud Drive, etc.). See: Sign in to iCloud on all your devices - Apple Support
Another Apple article that may help regarding connecting the two devices: Use Continuity to connect your Mac, iPhone, iPad, and Apple Watch - Apple Support