How do you change the battery in a Mac OS High Sierra
How do you change the Battery in your computer? The Apple stores are all closed. Is there a simple way to change the battery? Mine is now working properly. Thank you.
Vintage and obsolete products https://support.apple.com/HT201624
Your computer is now "vintage" which means Apple cannot guarantee repair. You can take your computer to an Apple Authorized Service Provider and have them install it if they have the parts, etc.
How to find your nearest Apple Authorized Service Provider (AASP) or Apple Authorized Distributor (AAD) - https://locate.apple.com/country or see if you can find any service locations in https://locate.apple.com/findlocations Some places with limited support may be included in the "other" link at the bottom of a region selection.