what cable is needed to connect my macbook 13inch ( mid 2009 ) to hdmi

You need an adapter like this

https://www.apple.com/shop/product/MUF82AM/A/usb-c-digital-av-multiport-adapter?fnode=900448eea9a13fb2fdfb54b0d8d3cc77e367d4bd6426cefe107c7e27736862b0d87fd2c31ac13548d0fc590a4562e293b24ecee0dc31791adf5d777eb22e140d14275c8141fa509ff26cd77e02ca78f1ada89351c4533573a02e9d3a33ca3316f2ea1dfb347cccdeb5cee5abfbe57ded&fs=f%3Dadapter%26fh%3D4595%252B45b0

PS: while that's correct IF the MacBook is newer than 'build 2015? model' year suggested by

lookup by serial number, sales order number, &/or mactracker database ~ & shows details.

https://everymac.com/ultimate-mac-lookup/

https://techable.com/apple/

https://www.powerbookmedic.com/identify-mac-serial.php

• apple identify your macbook model: https://support.apple.com/en-us/HT201608

Database mactracker.ca (& everymac site, among others online; plus older Apple support info)

shows these as 2009, with 'early/mid/late' designators ~ these evolved, over time by specs. To

differentiate they use other identifiers; EMC, Sales Order #, & build year/season; etc to be sure.

Hopefully this thread arrives in proper and corrected ASC topic thread! Research has been done.

Good luck in any event!🐌|🤖|🐢

Could be you need the use of "Mini-Displayport -to- HDMI adapter."

-or as noted below, early and mid 2009 could use Mini-DVI adapter-

A Mini-DVI to HDMI adapter (6" cable)? If you've the early/mid 2009

Earlier suggested part # does not supply any vintage port/plug for

old 2009 MacBook 13-inch model. (USB-C won't do anything @ all.)

• Connect to HDMI from your Mac - Apple Support

https://support.apple.com/en-us/HT204388

The Mini DisplayPort: Connects to HDMI using a

third-party Mini DisplayPort to HDMI adapter or cable.

(Or maybe it could use "Mini-DVI" for Early/Mid 2009 MacBook 13")

Several quality brands of these adapters should be available.

While I've some older portable Macs, haven't used monitors.

Good luck & happy trails!🌞🌿🐝⛵️

..Had intended a reply go to you, too; while this worked..

Figure any can read all these since they're not private!

While I have access to various info sources online and

saved links to other sources within web browser; w/o

exact identification, some leave 'mac-size' doubts.

{Also, made request (appears granted) for host to relocate

entire topic thread to the vintage '2006-2010' ASC section.}

At least there's something useful to further correct search.

Take care & happy computing!🤖🚀🐌🤔

Yes! Thank you for the correction.

I did read fast and mistakenly got 2019, I’m sorry, DRBBSLIDER. K Shaffer got it right for ya.

You need a USB C to HDMI cable.