Provide a clear example of a similar job you have done in the past.
Hello Sir,
Yes I have built several excel based applications that work on MAC pc and I can try to see and fix the file for you which is currently working on PC but not or MAC.
Thanks,
Jay
Proposal:
Hello Sir,
Thank you for this opportunity. My name is Jay and I am #1 Excel VBA and Macro programming expert on freelancer.com and have been featured by the freelancer community (https://www.freelancer.com/community/articles/jay-patkar-freelancer-success-story). About Me - I am an Engineering Graduate with an MBA degree. If you see I am among niche bidders who have 0 failed projects and 100% completion rate since I do not bid on projects which I am not certain of. I will not disappoint you, please give me an opportunity to work with you. No milestones required. Pay me only when your job is 100% done.
Also I will provide you with a sample work before you consider awarding me the project.
Thanks,
Jay