There is a blinking cursor indicating active fields, but I can’t type into them. The cursor doesn’t move. It seems to be read only, but there isn’t anything to read (new database). Running Version 4.2.0.4 under Mac/Mavericks.
Has your table got a primary key (PK)?
Database (Base) tables must have a PK to be editable. Usually the PK is an integer auto-value IDENTITY (ID) column which is needed to uniquely identify each row of the table. Open your EDIT TABLE window to check. See attached screenshot as an example. If your table does NOT have a PK, you will not be able to add any data to your table (either in the table listing or via a form). (Note: since you seem to have posted several versions of this question, perhaps you would delete the other ones.)