diff --git a/README.md b/README.md
index 005895a..7904a06 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Some systems provide pre-built packages:
 Compilation and installation from sources
 -----------------------------------------
 
-These are generic instructions to compile from the master branch, and should work on almost any GNU/Linux, Mac OS, BSD or similar.
+These are generic instructions to compile from the master branch, and should work on almost any GNU/Linux, macOS, BSD, or similar.
 
 If you want specific instructions for some distributions, check the [wiki](https://github.com/s3fs-fuse/s3fs-fuse/wiki/Installation-Notes).
 
diff --git a/src/s3fs.cpp b/src/s3fs.cpp
index 5a8dc11..f96f857 100644
--- a/src/s3fs.cpp
+++ b/src/s3fs.cpp
@@ -4319,7 +4319,7 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
       return 0;
     }
 
-    // the second NONPOT option is the mountpoint(not utility mode)
+    // the second NONOPT option is the mountpoint(not utility mode)
     if(0 == mountpoint.size() && 0 == utility_mode){
       // save the mountpoint and do some basic error checking
       mountpoint = arg;
@@ -4359,9 +4359,9 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
 
     // Unknown option
     if(0 == utility_mode){
-      S3FS_PRN_EXIT("specified unknown third optioni(%s).", arg);
+      S3FS_PRN_EXIT("specified unknown third option(%s).", arg);
     }else{
-      S3FS_PRN_EXIT("specified unknown second optioni(%s). you don't need to specify second option(mountpoint) for utility mode(-u).", arg);
+      S3FS_PRN_EXIT("specified unknown second option(%s). you don't need to specify second option(mountpoint) for utility mode(-u).", arg);
     }
     return -1;