Convert HEIC to JPG locally on macOS

sips-macos.txt

~ sips -s format jpeg example-image.heic --out example-image.jpg

=> additional information & formats
~ sips --version
sips-311

~ sips
sips - scriptable image processing system.
This tool is used to query or modify raster image files and ColorSync ICC profiles.
Its functionality can also be used through the "Image Events" AppleScript suite.

  Usages:
    sips [image-functions] imagefile ... 
    sips [profile-functions] profile ... 

  Profile query functions: 
    -g, --getProperty key 
    -X, --extractTag tag tagFile 
        --verify 
    -1, --oneLine 

  Image query functions: 
    -g, --getProperty key 
    -x, --extractProfile profile 
    -1, --oneLine 

  Profile modification functions: 
    -s, --setProperty key value 
    -d, --deleteProperty key 
        --deleteTag tag 
        --copyTag srcTag dstTag 
        --loadTag tag tagFile 
        --repair 
    -o, --out file-or-directory 

  Image modification functions: 
    -s, --setProperty key value 
    -d, --deleteProperty key 
    -e, --embedProfile profile 
    -E, --embedProfileIfNone profile 
    -m, --matchTo profile 
    -M, --matchToWithIntent profile intent 
        --deleteColorManagementProperties 
    -r, --rotate degreesCW 
    -f, --flip horizontal|vertical 
    -c, --cropToHeightWidth pixelsH pixelsW 
        --cropOffset offsetY offsetH 
    -p, --padToHeightWidth pixelsH pixelsW 
        --padColor hexcolor 
    -z, --resampleHeightWidth pixelsH pixelsW 
        --resampleWidth pixelsW 
        --resampleHeight pixelsH 
    -Z, --resampleHeightWidthMax pixelsWH 
    -i, --addIcon 
        --optimizeColorForSharing 
    -o, --out file-or-directory 
    -j, --js file 

  Other functions: 
        --debug           Enable debugging output
    -h, --help            Show help
    -H, --helpProperties  Show help for properties
        --man             Generate man pages
    -v, --version         Show the version
        --formats         Show the read/write formats

~ sips --formats
Supported Formats:
-------------------------------------------
com.adobe.pdf                pdf   Writable
com.adobe.photoshop-image    psd   Writable
com.adobe.raw-image          dng   
com.apple.atx                --    Writable
com.apple.icns               icns  Writable
com.apple.pict               pict  
com.canon.cr2-raw-image      cr2   
com.canon.cr3-raw-image      cr3   
com.canon.crw-raw-image      crw   
com.canon.tif-raw-image      tif   
com.compuserve.gif           gif   Writable
com.dxo.raw-image            dxo   
com.epson.raw-image          erf   
com.fuji.raw-image           raf   
com.hasselblad.3fr-raw-image 3fr   
com.hasselblad.fff-raw-image fff   
com.ilm.openexr-image        exr   Writable
com.kodak.raw-image          dcr   
com.konicaminolta.raw-image  mrw   
com.leafamerica.raw-image    mos   
com.leica.raw-image          raw   
com.leica.rwl-raw-image      rwl   
com.microsoft.bmp            bmp   Writable
com.microsoft.cur            --    
com.microsoft.dds            dds   Writable
com.microsoft.ico            ico   Writable
com.nikon.nrw-raw-image      nrw   
com.nikon.raw-image          nef   
com.olympus.or-raw-image     orf   
com.olympus.raw-image        orf   
com.olympus.sr-raw-image     orf   
com.panasonic.raw-image      raw   
com.panasonic.rw2-raw-image  rw2   
com.pentax.raw-image         pef   
com.phaseone.raw-image       iiq   
com.samsung.raw-image        srw   
com.sgi.sgi-image            sgi   
com.sony.arw-raw-image       arw   
com.sony.raw-image           srf   
com.sony.sr2-raw-image       sr2   
com.truevision.tga-image     tga   Writable
org.khronos.astc             astc  Writable
org.khronos.ktx              ktx   Writable
org.khronos.ktx2             --    Writable
org.webmproject.webp         webp  
public.avci                  avci  
public.avif                  avif  
public.avis                  --    
public.heic                  heic  Writable
public.heics                 heics Writable
public.heif                  heif  
public.jpeg                  jpeg  Writable
public.jpeg-2000             jp2   Writable
public.jpeg-xl               jxl   
public.mpo-image             mpo   
public.pbm                   pbm   Writable
public.png                   png   Writable
public.pvr                   pvr   Writable
public.radiance              pic   
public.svg-image             svg   
public.tiff                  tiff  Writable