openssl pkcs12 -in /Users/myname/fullchain.pem -inkey /Users/myname/privkey.pem -out /Users/myname/fullchain.pfx -cacerts

4552226412:error:0DFFF0A8:asn1 encoding routines:CRYPTO_internal:wrong tag:/BuildRoot/Library/Caches/com.apple.xbs/Sources/libressl/libressl-22.250.1/libressl-2.6/crypto/asn1/tasn_dec.c:1125:
4552226412:error:0DFFF03A:asn1 encoding routines:CRYPTO_internal:nested asn1 error:/BuildRoot/Library/Caches/com.apple.xbs/Sources/libressl/libressl-22.250.1/libressl-2.6/crypto/asn1/tasn_dec.c:306:Type=PKCS12

openssl pkcs12 -export -out  /Users/myname/fullchain.pfx -inkey /Users/myname/privkey.pem -in /Users/myname/fullchain.pem